1. WeatherSpark.com
  2. United States
  3. Wisconsin
  4. Windsor

Average Weather in Windsor Wisconsin, United States

In Windsor, the summers are warm and wet; the winters are freezing, dry, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 12°F to 82°F and is rarely below -7°F or above 90°F.

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

Climate Summary

freezingcoldcoolwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDec68%68%40%40%clearovercastprecipitation: 4.1 inprecipitation: 4.1 in0.8 in0.8 inmuggy: 36%muggy: 36%0%0%drydrytourism score: 6.7tourism score: 6.70.00.0
Click on each chart for more information.

Temperature

The warm season lasts for 3.9 months, from May 22 to September 18, with an average daily high temperature above 71°F. The hottest day of the year is July 19, with an average high of 82°F and low of 63°F.

The cold season lasts for 3.2 months, from November 30 to March 3, with an average daily high temperature below 38°F. The coldest day of the year is January 28, with an average low of 12°F and high of 27°F.

Average High and Low Temperature

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.

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

Average Hourly Temperature in WindsorJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfreezingfreezingcoldcoldcoolcomfortablewarmvery coldvery coldcomfortable
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.

Zarrit’ap’, Armenia (6,062 miles away) and Almaty, Kazakhstan (6,409 miles) are the far-away foreign places with temperatures most similar to Windsor (view comparison).

Clouds

In Windsor, 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 Windsor begins around June 7 and lasts for 4.5 months, ending around October 24. On August 26, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 68% of the time, and overcast or mostly cloudy 32% of the time.

The cloudier part of the year begins around October 24 and lasts for 7.5 months, ending around June 7. On January 2, the cloudiest day of the year, the sky is overcast or mostly cloudy 60% of the time, and clear, mostly clear, or partly cloudy 40% of the time.

Cloud Cover Categories

Cloud Cover Categories in WindsorclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 2668%Aug 2668%Jan 240%Jan 240%Jun 754%Jun 754%Oct 2454%Oct 2454%clearmostly 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.

Precipitation

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

The wetter season lasts 6.1 months, from March 31 to October 4, with a greater than 25% chance of a given day being a wet day. The chance of a wet day peaks at 38% on June 13.

The drier season lasts 5.9 months, from October 4 to March 31. The smallest chance of a wet day is 12% on February 8.

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 Windsor changes throughout the year.

Rain alone is the most common for 9.7 months, from February 21 to December 12. The highest chance of a day with rain alone is 38% on June 13.

Snow alone is the most common for 2.3 months, from December 12 to February 21. The highest chance of a day with snow alone is 10% on January 18.

Daily Chance of Precipitation

Daily Chance of Precipitation in WindsorsnowrainJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jun 1338%Jun 1338%Feb 812%Feb 812%Dec 1218%Dec 1218%Mar 3125%Mar 3125%Oct 425%Oct 425%snowrainmixed
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).

Rainfall

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. Windsor experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 11 months, from February 11 to December 31, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 15, with an average total accumulation of 4.1 inches.

The rainless period of the year lasts for 1.4 months, from December 31 to February 11. The least rain falls around January 21, with an average total accumulation of 0.3 inches.

Average Monthly Rainfall

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 liquid-equivalent snowfall.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

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

The snowy period of the year lasts for 5.1 months, from November 8 to April 12, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 21, with an average total liquid-equivalent accumulation of 0.5 inches.

The snowless period of the year lasts for 6.9 months, from April 12 to November 8. The least snow falls around July 30, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

The average liquid-equivalent 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.

Sun

The length of the day in Windsor varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 59 minutes of daylight; the longest day is June 21, with 15 hours, 23 minutes of daylight.

Hours of Daylight and Twilight

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.

The earliest sunrise is at 5:16 AM on June 15, and the latest sunrise is 2 hours, 18 minutes later at 7:34 AM on November 3. The earliest sunset is at 4:21 PM on December 9, and the latest sunset is 4 hours, 20 minutes later at 8:41 PM on June 26.

Daylight saving time (DST) is observed in Windsor during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in WindsorJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 155:16 AMJun 155:16 AM8:41 PMJun 268:41 PMJun 26Dec 94:21 PMDec 94:21 PM7:34 AMNov 37:34 AMNov 3Mar 11DSTMar 11DSTDSTNov 4DSTNov 4daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2018. 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.

Humidity

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.

Windsor experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.4 months, from June 4 to September 17, during which time the comfort level is muggy, oppressive, or miserable at least 9% of the time. The muggiest day of the year is July 23, with muggy conditions 36% of the time.

The least muggy day of the year is February 24, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

Humidity Comfort Levels in WindsormuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 240%Feb 240%Jul 2336%Jul 2336%Jun 49%Jun 49%Sep 179%Sep 179%muggymuggydrydryhumidhumidcomfortablecomfortableoppressiveoppressive
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.

Wind

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 Windsor experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.8 months, from September 30 to May 22, with average wind speeds of more than 10.2 miles per hour. The windiest day of the year is March 23, with an average hourly wind speed of 12.5 miles per hour.

The calmer time of year lasts for 4.2 months, from May 22 to September 30. The calmest day of the year is August 3, with an average hourly wind speed of 8.0 miles per hour.

Average Wind Speed

Average Wind Speed in WindsorwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mph18 mph20 mphMar 2312.5 mphMar 2312.5 mphAug 38.0 mphAug 38.0 mphSep 3010.2 mphSep 3010.2 mphMay 2210.2 mphMay 2210.2 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

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

The wind is most often from the north for 1.6 months, from February 24 to April 12, with a peak percentage of 32% on March 8. The wind is most often from the south for 2.6 months, from April 28 to July 16; for 2.2 months, from August 4 to October 11; and for 1.6 weeks, from November 3 to November 14, with a peak percentage of 38% on September 6. The wind is most often from the west for 2.7 weeks, from July 16 to August 4; for 3.3 weeks, from October 11 to November 3; and for 3.4 months, from November 14 to February 24, with a peak percentage of 33% on October 27.

Wind Direction

Wind Direction in WindsorWNESWSWSWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsoutheastnorth
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).

Water Temperature

Windsor 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 7 to September 22, with an average temperature above 63°F. The day of the year with the warmest water is August 13, with an average temperature of 69°F.

The time of year with cooler water lasts for 5.3 months, from December 1 to May 11, with an average temperature below 42°F. The day of the year with the coolest water is February 27, with an average temperature of 35°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is in Windsor 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 Windsor for general outdoor tourist activities is from mid June to early September, with a peak score in the second week of August.

Tourism Score

Tourism Score in Windsorbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.76.70.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Windsor for hot-weather activities is from late June to mid August, with a peak score in the third week of July.

Beach/Pool Score

Beach/Pool Score in WindsorJanFebMarAprMayJunJulAugSepOctNovDec02468105.05.00.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/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.

Growing Season

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 Windsor typically lasts for 5.1 months (158 days), from around May 2 to around October 6, rarely starting before April 13 or after May 21, and rarely ending before September 20 or after October 23.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Windsorgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 250%May 250%Oct 650%Oct 650%May 2190%May 2190%Sep 2090%Sep 2090%Apr 1310%Apr 1310%Oct 2310%Oct 2310%Jul 24100%Jul 24100%frigidfreezingvery coldcoolcomfortablewarmcoldhot
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 Windsor should appear around April 22, only rarely appearing before April 10 or after May 6.

Growing Degree Days

The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 6 to August 19, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is July 1, with an average of 7.0 kWh.

The darker period of the year lasts for 3.4 months, from October 30 to February 11, with an average daily incident shortwave energy per square meter below 2.7 kWh. The darkest day of the year is December 22, with an average of 1.6 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Windsor are 43.218 deg latitude, -89.342 deg longitude, and 932 ft elevation.

The topography within 2 miles of Windsor contains only modest variations in elevation, with a maximum elevation change of 207 feet and an average elevation above sea level of 926 feet. Within 10 miles also contains only modest variations in elevation (318 feet). Within 50 miles contains only modest variations in elevation (1,040 feet).

The area within 2 miles of Windsor is covered by cropland (90%), within 10 miles by cropland (80%) and artificial surfaces (13%), and within 50 miles by cropland (72%) and trees (21%).

Data Sources

This report illustrates the typical weather in Windsor, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Windsor.

For each station, the records are corrected for the elevation difference between that station and Windsor 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 Windsor is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Windsor and a given station.

The stations contributing to this reconstruction are: Dane County Regional Airport (80%, 9 kilometers, south); Baraboo Wisconsin Dells Airport (6%, 49 kilometers, northwest); Watertown Municipal Airport (6%, 51 kilometers, east); Dodge County Airport (4.9%, 57 kilometers, northeast); and Tri-County Regional Airport (3.7%, 68 kilometers, west).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

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.