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Climate and Average Weather Year Round in Silverton Oregon, United States

In Silverton, the summers are short, warm, dry, and mostly clear and the winters are very cold, wet, and overcast. Over the course of the year, the temperature typically varies from 36°F to 86°F and is rarely below 26°F or above 98°F.

Based on the tourism score, the best time of year to visit Silverton for warm-weather activities is from early July to late August.

Climate in Silverton

coldcoolcomfortablewarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow82%82%23%23%clearovercastprecipitation: 9.4 inprecipitation: 9.4 in0.3 in0.3 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 7.1tourism score: 7.10.10.1
Silverton weather by month. Click on each chart for more information.

The hot season lasts for 2.7 months, from June 26 to September 16, with an average daily high temperature above 78°F. The hottest month of the year in Silverton is August, with an average high of 85°F and low of 56°F.

The cool season lasts for 3.6 months, from November 10 to February 27, with an average daily high temperature below 54°F. The coldest month of the year in Silverton is December, with an average low of 37°F and high of 47°F.

Average High and Low Temperature in Silverton

Average High and Low Temperature in SilvertonhotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FDec 2946°FDec 2946°FAug 386°FAug 386°F36°F36°F57°F57°FJun 2678°FJun 2678°FSep 1678°FSep 1678°FNov 1054°FNov 1054°FFeb 2754°FFeb 2754°F53°F53°F52°F52°F42°F42°F39°F39°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 48°F52°F57°F62°F68°F75°F84°F85°F78°F65°F53°F47°F
Temp. 42°F44°F47°F51°F57°F62°F68°F69°F63°F54°F46°F41°F
Low 37°F38°F40°F43°F48°F52°F56°F56°F52°F46°F41°F37°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 Silverton

Average Hourly Temperature in SilvertonJanFebMarAprMayJunJulAugSepOctNovDec12 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 AMNowNowvery coldvery coldcoldcoldcoolcomfortablewarm
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.

Casalarreina, Spain (5,351 miles away) is the far-away foreign place with temperatures most similar to Silverton (view comparison).

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

The clearer part of the year in Silverton begins around June 11 and lasts for 3.9 months, ending around October 7.

The clearest month of the year in Silverton is August, during which on average the sky is clear, mostly clear, or partly cloudy 77% of the time.

The cloudier part of the year begins around October 7 and lasts for 8.1 months, ending around June 11.

The cloudiest month of the year in Silverton is December, during which on average the sky is overcast or mostly cloudy 76% of the time.

Cloud Cover Categories in Silverton

Cloud Cover Categories in SilvertonclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 282%Aug 282%Nov 2923%Nov 2923%Jun 1152%Jun 1152%Oct 753%Oct 753%NowNowclearpartly cloudymostly cloudyovercastmostly clear
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 75%72%71%67%57%44%24%23%34%55%73%76%
Clearer 25%28%29%33%43%56%76%77%66%45%27%24%

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

The wetter season lasts 7.1 months, from October 12 to May 16, with a greater than 32% chance of a given day being a wet day. The month with the most wet days in Silverton is November, with an average of 16.8 days with at least 0.04 inches of precipitation.

The drier season lasts 4.9 months, from May 16 to October 12. The month with the fewest wet days in Silverton is August, with an average of 2.3 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. The month with the most days of rain alone in Silverton is November, with an average of 16.6 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 58% on November 26.

Daily Chance of Precipitation in Silverton

Daily Chance of Precipitation in SilvertonwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Nov 2659%Nov 2659%Aug 34%Aug 34%Oct 1232%Oct 1232%May 1632%May 1632%NowNowrain
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 14.7d13.8d15.3d12.7d9.8d6.6d2.4d2.3d5.7d10.7d16.6d16.0d
Mixed 0.5d0.3d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.2d0.6d
Snow 0.2d0.2d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.2d
Any 15.4d14.2d15.4d12.7d9.8d6.6d2.4d2.3d5.7d10.7d16.8d16.9d

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. Silverton experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Silverton. The month with the most rain in Silverton is November, with an average rainfall of 8.7 inches.

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

Average Monthly Rainfall in Silverton

Average Monthly Rainfall in SilvertonJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 inDec 19.3 inDec 19.3 inJul 290.3 inJul 290.3 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 7.5″6.5″5.6″4.0″2.8″1.7″0.5″0.5″1.8″4.5″8.7″8.7″

Snowfall

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

The snowy period of the year lasts for 3.6 weeks, from December 13 to January 7, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Silverton is December, with an average snowfall of 1.1 inches.

The snowless period of the year lasts for 11 months, from January 7 to December 13. The least snow falls around July 18, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Silverton

Average Monthly Snowfall in SilvertonJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inDec 211.2 inDec 211.2 inJul 180.0 inJul 180.0 inJan 71.0 inJan 71.0 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 0.8″0.7″0.1″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.2″1.1″

The length of the day in Silverton varies significantly over the course of the year. In 2024, the shortest day is December 21, with 8 hours, 46 minutes of daylight; the longest day is June 20, with 15 hours, 37 minutes of daylight.

Hours of Daylight and Twilight in Silverton

Hours of Daylight and Twilight in SilvertonJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 1912 hr, 8 minMar 1915 hr, 37 minJun 2015 hr, 37 minJun 2012 hr, 11 minSep 2212 hr, 11 minSep 228 hr, 46 minDec 218 hr, 46 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 9.2h10.4h12.0h13.6h14.9h15.6h15.2h14.0h12.5h10.9h9.5h8.8h

The earliest sunrise is at 5:23 AM on June 15, and the latest sunrise is 2 hours, 28 minutes later at 7:51 AM on November 2. The earliest sunset is at 4:29 PM on December 9, and the latest sunset is 4 hours, 33 minutes later at 9:02 PM on June 26.

Daylight saving time (DST) is observed in Silverton 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 Silverton

Sunrise & Sunset with Twilight and Daylight Saving Time in SilvertonJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 155:23 AMJun 155:23 AM9:02 PMJun 269:02 PMJun 26Dec 94:29 PMDec 94:29 PM7:51 AMNov 27:51 AMNov 2Mar 10DSTMar 10DSTDSTNov 3DSTNov 3daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
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 Silverton

Solar Elevation and Azimuth in SilvertonJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM000101010102020203030304040506000010101020202020303040405050602268NowNow
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 Silverton

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.

The perceived humidity level in Silverton, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

Humidity Comfort Levels in Silverton

Humidity Comfort Levels in SilvertonJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 40%Jan 40%Jul 120%Jul 120%NowNowdrydrycomfortablecomfortable
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 0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d

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 Silverton experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.2 months, from October 26 to April 1, with average wind speeds of more than 5.1 miles per hour. The windiest month of the year in Silverton is December, with an average hourly wind speed of 5.9 miles per hour.

The calmer time of year lasts for 6.8 months, from April 1 to October 26. The calmest month of the year in Silverton is July, with an average hourly wind speed of 4.1 miles per hour.

Average Wind Speed in Silverton

Average Wind Speed in SilvertonwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mph10 mph10 mphDec 26.1 mphDec 26.1 mphJul 314.1 mphJul 314.1 mphOct 265.1 mphOct 265.1 mphApr 15.1 mphApr 15.1 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) 5.85.65.34.84.44.34.14.14.44.95.85.9

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

The wind is most often from the west for 2.2 months, from April 21 to June 26, with a peak percentage of 42% on May 29. The wind is most often from the north for 3.0 months, from June 26 to September 26, with a peak percentage of 48% on July 20. The wind is most often from the south for 6.8 months, from September 26 to April 21, with a peak percentage of 50% on January 1.

Wind Direction in Silverton

Wind Direction in SilvertonSWNSJanFebMarAprMayJunJulAugSepOctNovDec0%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).

Silverton 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 some seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.3 months, from June 15 to September 26, with an average temperature above 57°F. The month of the year in Silverton with the warmest water is August, with an average temperature of 59°F.

The time of year with cooler water lasts for 4.3 months, from December 9 to April 19, with an average temperature below 51°F. The month of the year in Silverton with the coolest water is February, with an average temperature of 49°F.

Average Water Temperature in Silverton

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 50°F49°F50°F51°F54°F57°F58°F59°F58°F55°F53°F51°F

To characterize how pleasant the weather is in Silverton 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 Silverton for general outdoor tourist activities is from early July to late August, with a peak score in the last week of July.

Tourism Score in Silverton

Tourism Score in Silvertonbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.17.10.10.1NowNowtemperaturetemperature 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 Silverton for hot-weather activities is from mid July to mid August, with a peak score in the first week of August.

Beach/Pool Score in Silverton

Beach/Pool Score in SilvertonJanFebMarAprMayJunJulAugSepOctNovDec002244668810103.03.00.00.0NowNowtemperaturetemperature 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 Silverton typically lasts for 7.3 months (224 days), from around March 30 to around November 9, rarely starting before February 26 or after April 29, and rarely ending before October 14 or after December 12.

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

Time Spent in Various Temperature Bands and the Growing Season in Silvertongrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 3050%Mar 3050%Nov 950%Nov 990%Apr 2990%Apr 2990%Oct 1490%Oct 1410%Feb 2610%Feb 2610%Dec 1210%Dec 120%Jan 160%Jan 16Jul 24100%Jul 24100%very 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 Silverton should appear around March 31, only rarely appearing before March 9 or after April 19.

Growing Degree Days in Silverton

Growing Degree Days in SilvertonJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°FMar 3189°FMar 3189°FJul 6900°FJul 6900°FAug 251,800°FAug 251,800°FDec 312,545°FDec 312,545°F
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 2.8 months, from May 30 to August 24, with an average daily incident shortwave energy per square meter above 6.1 kWh. The brightest month of the year in Silverton is July, with an average of 7.3 kWh.

The darker period of the year lasts for 3.9 months, from October 25 to February 22, with an average daily incident shortwave energy per square meter below 2.3 kWh. The darkest month of the year in Silverton is December, with an average of 1.1 kWh.

Average Daily Incident Shortwave Solar Energy in Silverton

Average Daily Incident Shortwave Solar Energy in SilvertonbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJul 157.4 kWhJul 157.4 kWhDec 251.1 kWhDec 251.1 kWhMay 306.1 kWhMay 306.1 kWhAug 246.1 kWhAug 246.1 kWhOct 252.3 kWhOct 252.3 kWhFeb 222.3 kWhFeb 222.3 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) 1.32.13.24.65.86.77.36.54.82.91.51.1

For the purposes of this report, the geographical coordinates of Silverton are 45.005 deg latitude, -122.783 deg longitude, and 249 ft elevation.

The topography within 2 miles of Silverton contains significant variations in elevation, with a maximum elevation change of 594 feet and an average elevation above sea level of 325 feet. Within 10 miles contains significant variations in elevation (1,982 feet). Within 50 miles contains large variations in elevation (5,955 feet).

The area within 2 miles of Silverton is covered by cropland (71%) and artificial surfaces (22%), within 10 miles by cropland (74%) and shrubs (11%), and within 50 miles by trees (42%) and cropland (29%).

This report illustrates the typical weather in Silverton, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Silverton.

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