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Climate and Average Weather Year Round in Wauwatosa Wisconsin, United States

In Wauwatosa, the summers are warm; the winters are freezing, snowy, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 16°F to 81°F and is rarely below -2°F or above 90°F.

Based on the tourism score, the best time of year to visit Wauwatosa for warm-weather activities is from late June to early September.

Climate in Wauwatosa

freezingvery coldcoldcoolwarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow67%67%42%42%clearovercastprecipitation: 3.6 inprecipitation: 3.6 in1.0 in1.0 inmuggy: 32%muggy: 32%0%0%drydrytourism score: 6.9tourism score: 6.90.00.0
Wauwatosa weather by month. Click on each chart for more information.

The warm season lasts for 3.7 months, from May 28 to September 17, with an average daily high temperature above 71°F. The hottest month of the year in Wauwatosa is July, with an average high of 81°F and low of 63°F.

The cold season lasts for 3.3 months, from November 30 to March 6, with an average daily high temperature below 39°F. The coldest month of the year in Wauwatosa is January, with an average low of 17°F and high of 29°F.

Average High and Low Temperature in Wauwatosa

Average High and Low Temperature in WauwatosawarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec-10°F-10°F0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2829°FJan 2829°FJul 1881°FJul 1881°F16°F16°F64°F64°FMay 2871°FMay 2871°FSep 1771°FSep 1771°FNov 3039°FNov 3039°FMar 639°FMar 639°F52°F52°F54°F54°F27°F27°F26°F26°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 29°F32°F43°F55°F67°F76°F81°F79°F71°F59°F46°F33°F
Temp. 22°F25°F35°F46°F56°F66°F72°F70°F63°F51°F39°F27°F
Low 17°F20°F29°F38°F48°F58°F63°F62°F55°F43°F32°F22°F

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in Wauwatosa

Average Hourly Temperature in WauwatosaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowfreezingfreezingvery coldvery coldcoldcoldcoolcomfortablecomfortablewarm
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.
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Marker
© OpenStreetMap contributors

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In Wauwatosa, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Wauwatosa begins around June 10 and lasts for 4.4 months, ending around October 22.

The clearest month of the year in Wauwatosa is August, during which on average the sky is clear, mostly clear, or partly cloudy 66% of the time.

The cloudier part of the year begins around October 22 and lasts for 7.6 months, ending around June 10.

The cloudiest month of the year in Wauwatosa is January, during which on average the sky is overcast or mostly cloudy 57% of the time.

Cloud Cover Categories in Wauwatosa

Cloud Cover Categories in WauwatosaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 2767%Aug 2767%Feb 642%Feb 642%Jun 1054%Jun 1054%Oct 2254%Oct 2254%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 57%57%54%54%50%43%36%34%35%44%52%56%
Clearer 43%43%46%46%50%57%64%66%65%56%48%44%

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Wauwatosa varies throughout the year.

The wetter season lasts 6.3 months, from March 29 to October 8, with a greater than 25% chance of a given day being a wet day. The month with the most wet days in Wauwatosa is June, with an average of 10.6 days with at least 0.04 inches of precipitation.

The drier season lasts 5.7 months, from October 8 to March 29. The month with the fewest wet days in Wauwatosa is February, with an average of 4.2 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation in Wauwatosa changes throughout the year.

Rain alone is the most common for 10 months, from February 12 to December 25. The month with the most days of rain alone in Wauwatosa is June, with an average of 10.6 days.

Snow alone is the most common for 1.6 months, from December 25 to February 12. The month with the most days of snow alone in Wauwatosa is January, with an average of 2.4 days.

Daily Chance of Precipitation in Wauwatosa

Daily Chance of Precipitation in WauwatosasnowrainJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 1236%Jun 1236%Feb 213%Feb 213%Dec 2517%Dec 2517%Mar 2925%Mar 2925%Oct 825%Oct 825%NowNowsnowrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 1.5d1.8d4.6d8.0d10.0d10.6d10.6d10.2d8.8d7.1d5.3d2.8d
Mixed 0.8d0.8d0.8d0.4d0.0d0.0d0.0d0.0d0.0d0.1d0.6d1.2d
Snow 2.4d1.7d1.0d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.4d1.8d
Any 4.7d4.2d6.4d8.5d10.0d10.6d10.6d10.2d8.8d7.2d6.3d5.8d

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Wauwatosa experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Wauwatosa. The month with the most rain in Wauwatosa is June, with an average rainfall of 3.6 inches.

The month with the least rain in Wauwatosa is January, with an average rainfall of 0.5 inches.

Average Monthly Rainfall in Wauwatosa

Average Monthly Rainfall in WauwatosaJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inJun 143.6 inJun 143.6 inJan 230.5 inJan 230.5 inAug 43.3 inAug 43.3 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 0.5″0.7″1.5″2.8″3.1″3.6″3.2″3.3″3.1″2.4″1.8″1.0″

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Wauwatosa experiences significant seasonal variation in monthly snowfall.

The snowy period of the year lasts for 4.8 months, from November 12 to April 5, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Wauwatosa is January, with an average snowfall of 4.7 inches.

The snowless period of the year lasts for 7.2 months, from April 5 to November 12. The least snow falls around July 30, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Wauwatosa

Average Monthly Snowfall in WauwatosasnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 inJan 34.9 inJan 34.9 inJul 300.0 inJul 300.0 inNov 121.0 inNov 121.0 inApr 51.0 inApr 51.0 inNowNow
The average snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Snowfall 4.7″4.4″2.5″0.6″0.0″0.0″0.0″0.0″0.0″0.1″1.2″4.5″

The length of the day in Wauwatosa varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 0 minutes of daylight; the longest day is June 20, with 15 hours, 22 minutes of daylight.

Hours of Daylight and Twilight in Wauwatosa

Hours of Daylight and Twilight in WauwatosaJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 1912 hr, 8 minMar 1915 hr, 22 minJun 2015 hr, 22 minJun 2012 hr, 11 minSep 2212 hr, 11 minSep 229 hr, 0 minDec 219 hr, 0 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 9.4h10.6h12.0h13.5h14.7h15.3h15.0h13.9h12.5h11.0h9.7h9.1h

The earliest sunrise is at 5:12 AM on June 15, and the latest sunrise is 2 hours, 17 minutes later at 7:28 AM on November 2. The earliest sunset is at 4:17 PM on December 7, and the latest sunset is 4 hours, 18 minutes later at 8:35 PM on June 26.

Daylight saving time (DST) is observed in Wauwatosa during 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3.

Sunrise & Sunset with Twilight and Daylight Saving Time in Wauwatosa

Sunrise & Sunset with Twilight and Daylight Saving Time in WauwatosaJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 155:12 AMJun 155:12 AM8:35 PMJun 268:35 PMJun 26Dec 74:17 PMDec 74:17 PM7:28 AMNov 27:28 AMNov 2Mar 10DSTMar 10DSTDSTNov 3DSTNov 3daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2024. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in Wauwatosa

Solar Elevation and Azimuth in WauwatosaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AM00010101010202020303030404050606000010101020202020303040405050602470NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases in Wauwatosa

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Wauwatosa experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.4 months, from June 6 to September 19, during which time the comfort level is muggy, oppressive, or miserable at least 8% of the time. The month with the most muggy days in Wauwatosa is July, with 9.0 days that are muggy or worse.

The least muggy day of the year is February 14, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Wauwatosa

Humidity Comfort Levels in WauwatosamuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 140%Feb 140%Jul 2632%Jul 2632%Jun 68%Jun 68%Sep 198%Sep 198%NowNowmuggymuggycomfortablecomfortabledrydryhumidhumidoppressiveoppressive
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 0.0d0.0d0.0d0.0d0.7d3.8d9.0d8.4d3.3d0.3d0.0d0.0d

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Wauwatosa experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.3 months, from September 29 to May 7, with average wind speeds of more than 11.4 miles per hour. The windiest month of the year in Wauwatosa is January, with an average hourly wind speed of 14.1 miles per hour.

The calmer time of year lasts for 4.7 months, from May 7 to September 29. The calmest month of the year in Wauwatosa is August, with an average hourly wind speed of 9.0 miles per hour.

Average Wind Speed in Wauwatosa

Average Wind Speed in WauwatosawindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mph20 mph20 mph22 mph22 mphJan 1514.2 mphJan 1514.2 mphAug 28.7 mphAug 28.7 mphSep 2911.4 mphSep 2911.4 mphMay 711.4 mphMay 711.4 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 14.113.713.212.611.09.79.09.010.612.113.113.4

The predominant average hourly wind direction in Wauwatosa varies throughout the year.

The wind is most often from the north for 1.8 months, from February 29 to April 24, with a peak percentage of 32% on March 7. The wind is most often from the south for 2.2 months, from April 27 to July 2 and for 1.9 months, from August 6 to October 3, with a peak percentage of 36% on September 5. The wind is most often from the west for 1.1 months, from July 2 to August 6 and for 4.9 months, from October 3 to February 28, with a peak percentage of 32% on July 18.

Wind Direction in Wauwatosa

Wind Direction in WauwatosaWNSWSWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Wauwatosa is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.5 months, from July 6 to September 23, with an average temperature above 64°F. The month of the year in Wauwatosa with the warmest water is August, with an average temperature of 70°F.

The time of year with cooler water lasts for 5.4 months, from December 5 to May 18, with an average temperature below 43°F. The month of the year in Wauwatosa with the coolest water is February, with an average temperature of 36°F.

Average Water Temperature in Wauwatosa

Average Water Temperature in WauwatosawarmcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°FAug 1371°FAug 1371°F36°FFeb 2836°FFeb 28Jul 664°FJul 664°FSep 2364°FSep 2364°FDec 543°FDec 543°FMay 1843°FMay 1843°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 38°F36°F36°F38°F43°F54°F67°F70°F66°F56°F47°F41°F

To characterize how pleasant the weather is in Wauwatosa throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Wauwatosa for general outdoor tourist activities is from late June to early September, with a peak score in the second week of August.

Tourism Score in Wauwatosa

Tourism Score in Wauwatosabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.96.90.00.0NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationtourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Wauwatosa for hot-weather activities is from early July to mid August, with a peak score in the third week of July.

Beach/Pool Score in Wauwatosa

Beach/Pool Score in Wauwatosabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.15.10.00.0NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationbeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Wauwatosa typically lasts for 5.9 months (180 days), from around April 20 to around October 17, rarely starting before April 1 or after May 10, and rarely ending before September 27 or after November 8.

Time Spent in Various Temperature Bands and the Growing Season in Wauwatosa

Time Spent in Various Temperature Bands and the Growing Season in Wauwatosagrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Apr 2050%Apr 2050%Oct 1750%Oct 1750%May 1090%May 1090%Sep 2790%Sep 2790%Apr 110%Apr 110%Nov 810%Nov 810%0%Feb 50%Feb 5Jul 22100%Jul 22100%NowNowfreezingvery coldcoldcoolcomfortablewarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Wauwatosa should appear around April 25, only rarely appearing before April 11 or after May 10.

Growing Degree Days in Wauwatosa

Growing Degree Days in WauwatosaJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°FApr 2589°FApr 2589°FJul 2900°FJul 2900°FAug 131,800°FAug 131,800°FDec 312,713°FDec 312,713°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.4 months, from May 5 to August 17, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest month of the year in Wauwatosa is June, with an average of 6.8 kWh.

The darker period of the year lasts for 3.5 months, from October 30 to February 12, with an average daily incident shortwave energy per square meter below 2.7 kWh. The darkest month of the year in Wauwatosa is December, with an average of 1.6 kWh.

Average Daily Incident Shortwave Solar Energy in Wauwatosa

Average Daily Incident Shortwave Solar Energy in WauwatosabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 307.0 kWhJun 307.0 kWhDec 211.6 kWhDec 211.6 kWhMay 55.9 kWhMay 55.9 kWhAug 175.9 kWhAug 175.9 kWhOct 302.7 kWhOct 302.7 kWhFeb 122.7 kWhFeb 122.7 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 1.92.84.05.26.26.86.86.04.83.32.11.6

For the purposes of this report, the geographical coordinates of Wauwatosa are 43.049 deg latitude, -88.008 deg longitude, and 659 ft elevation.

The topography within 2 miles of Wauwatosa contains only modest variations in elevation, with a maximum elevation change of 177 feet and an average elevation above sea level of 714 feet. Within 10 miles also contains only modest variations in elevation (440 feet). Within 50 miles contains only modest variations in elevation (738 feet).

The area within 2 miles of Wauwatosa is covered by artificial surfaces (100%), within 10 miles by artificial surfaces (74%) and water (12%), and within 50 miles by cropland (42%) and water (40%).

This report illustrates the typical weather in Wauwatosa, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Wauwatosa.

For each station, the records are corrected for the elevation difference between that station and Wauwatosa according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Wauwatosa is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Wauwatosa and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Wauwatosa and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

Please review our full terms contained on our Terms of Service page.