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Climate and Average Weather Year Round in Williams Arizona, United States

In Williams, the summers are warm and mostly clear and the winters are very cold, snowy, and partly cloudy. Over the course of the year, the temperature typically varies from 22°F to 82°F and is rarely below 11°F or above 89°F.

Based on the tourism score, the best time of year to visit Williams for warm-weather activities is from mid June to late August.

Climate in Williams

coldcoolwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow84%84%58%58%clearovercastprecipitation: 1.9 inprecipitation: 1.9 in0.3 in0.3 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 6.5tourism score: 6.50.20.2
Williams weather by month. Click on each chart for more information.

The warm season lasts for 3.4 months, from May 31 to September 12, with an average daily high temperature above 74°F. The hottest month of the year in Williams is July, with an average high of 81°F and low of 54°F.

The cold season lasts for 3.5 months, from November 21 to March 4, with an average daily high temperature below 51°F. The coldest month of the year in Williams is December, with an average low of 23°F and high of 45°F.

Average High and Low Temperature in Williams

Average High and Low Temperature in WilliamswarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 443°FJan 443°FJul 382°FJul 382°F22°F22°F53°F53°FMay 3174°FMay 3174°FSep 1274°FSep 1274°FNov 2151°FNov 2151°FMar 451°FMar 451°F44°F44°F47°F47°F27°F27°F27°F27°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 44°F48°F54°F60°F69°F79°F81°F78°F73°F64°F53°F45°F
Temp. 32°F35°F40°F46°F55°F65°F68°F65°F60°F50°F39°F32°F
Low 22°F24°F28°F33°F40°F48°F54°F53°F46°F37°F29°F23°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 Williams

Average Hourly Temperature in WilliamsJanFebMarAprMayJunJulAugSepOctNovDec12 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 AMNowNowfreezingfreezingfreezingfreezingvery 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.

Candelario, Spain (5,437 miles away); Altınyayla, Turkey (6,881 miles); and Gümüşhacıköy, Turkey (6,792 miles) are the far-away foreign places with temperatures most similar to Williams (view comparison).

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In Williams, 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 Williams begins around August 18 and lasts for 2.5 months, ending around November 3.

The clearest month of the year in Williams is September, during which on average the sky is clear, mostly clear, or partly cloudy 82% of the time.

The cloudier part of the year begins around November 3 and lasts for 9.5 months, ending around August 18.

The cloudiest month of the year in Williams is February, during which on average the sky is overcast or mostly cloudy 41% of the time.

Cloud Cover Categories in Williams

Cloud Cover Categories in WilliamsclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Sep 1884%Sep 1884%Feb 1958%Feb 1958%Nov 372%Nov 372%NowNowclearovercastmostly clearmostly cloudypartly cloudy
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 38%41%35%29%25%18%30%30%18%22%31%37%
Clearer 62%59%65%71%75%82%70%70%82%78%69%63%

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

The wetter season lasts 2.2 months, from July 5 to September 11, with a greater than 20% chance of a given day being a wet day. The month with the most wet days in Williams is August, with an average of 10.2 days with at least 0.04 inches of precipitation.

The drier season lasts 9.8 months, from September 11 to July 5. The month with the fewest wet days in Williams is June, with an average of 1.9 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 Williams changes throughout the year.

Rain alone is the most common for 9.9 months, from February 2 to February 13, from February 17 to February 28, and from March 16 to December 20. The month with the most days of rain alone in Williams is August, with an average of 10.2 days.

Mixed snow and rain is the most common for 2.1 months, from February 13 to February 17, from February 28 to March 16, and from December 20 to February 2. The month with the most days of mixed snow and rain in Williams is February, with an average of 1.8 days.

Daily Chance of Precipitation in Williams

Daily Chance of Precipitation in WilliamsmixedrainJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Aug 336%Aug 336%Jun 83%Jun 83%Feb 214%Feb 214%Mar 1614%Mar 1614%Dec 2013%Dec 2013%Jul 520%Jul 520%Sep 1120%Sep 1120%NowNowrainmixedsnow
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 1.4d1.8d1.8d1.6d1.9d1.9d8.9d10.2d5.5d2.9d1.9d1.5d
Mixed 1.7d1.8d1.8d0.7d0.1d0.0d0.0d0.0d0.0d0.3d0.8d1.4d
Snow 1.2d1.0d0.8d0.2d0.0d0.0d0.0d0.0d0.0d0.0d0.3d1.0d
Any 4.3d4.7d4.5d2.6d2.1d1.9d8.9d10.2d5.5d3.2d3.0d3.9d

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. Williams experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.1 months, from June 24 to March 29, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Williams is August, with an average rainfall of 1.8 inches.

The rainless period of the year lasts for 2.9 months, from March 29 to June 24. The month with the least rain in Williams is June, with an average rainfall of 0.3 inches.

Average Monthly Rainfall in Williams

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 0.7″1.0″0.6″0.4″0.3″0.3″1.5″1.8″1.3″0.9″0.8″0.8″

Snowfall

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

The snowy period of the year lasts for 5.8 months, from November 2 to April 26, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Williams is January, with an average snowfall of 5.3 inches.

The snowless period of the year lasts for 6.2 months, from April 26 to November 2. The least snow falls around July 28, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Williams

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 5.3″4.9″4.4″1.7″0.2″0.0″0.0″0.0″0.0″0.4″1.7″4.3″

The length of the day in Williams varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 47 minutes of daylight; the longest day is June 20, with 14 hours, 32 minutes of daylight.

Hours of Daylight and Twilight in Williams

Hours of Daylight and Twilight in WilliamsJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 1912 hr, 7 minMar 1914 hr, 32 minJun 2014 hr, 32 minJun 2012 hr, 10 minSep 2212 hr, 10 minSep 229 hr, 47 minDec 219 hr, 47 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 10.1h10.9h12.0h13.1h14.0h14.5h14.2h13.4h12.4h11.3h10.3h9.8h

The earliest sunrise is at 5:13 AM on June 12, and the latest sunrise is 2 hours, 24 minutes later at 7:37 AM on January 7. The earliest sunset is at 5:16 PM on December 4, and the latest sunset is 2 hours, 31 minutes later at 7:47 PM on June 28.

Daylight saving time (DST) is not observed in Williams during 2024.

Sunrise & Sunset with Twilight in Williams

Sunrise & Sunset with Twilight in WilliamsJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 125:13 AMJun 125:13 AM7:47 PMJun 287:47 PMJun 28Dec 45:16 PMDec 45:16 PM7:37 AMJan 77:37 AMJan 7daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 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 Williams

Solar Elevation and Azimuth in WilliamsJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM00001010101020202020303030304040405050506060700000101010102020202030303030404040505060703178NowNow
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 Williams

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 Williams, 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 Williams

Humidity Comfort Levels in WilliamsJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 10%Feb 10%Aug 20%Aug 20%NowNowdrydry
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 Williams experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 8.0 months, from November 1 to June 30, with average wind speeds of more than 7.8 miles per hour. The windiest month of the year in Williams is April, with an average hourly wind speed of 9.5 miles per hour.

The calmer time of year lasts for 4.0 months, from June 30 to November 1. The calmest month of the year in Williams is August, with an average hourly wind speed of 6.1 miles per hour.

Average Wind Speed in Williams

Average Wind Speed in WilliamswindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphApr 99.6 mphApr 99.6 mphAug 115.9 mphAug 115.9 mphNov 17.8 mphNov 17.8 mphJun 307.8 mphJun 307.8 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) 8.28.59.09.59.18.66.76.17.17.68.08.1

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

The wind is most often from the south for 2.9 weeks, from February 14 to March 5 and for 1.9 months, from August 21 to October 17, with a peak percentage of 40% on September 14. The wind is most often from the west for 5.5 months, from March 5 to August 21, with a peak percentage of 49% on July 13. The wind is most often from the east for 3.9 months, from October 17 to February 14, with a peak percentage of 38% on January 1.

Wind Direction in Williams

Wind Direction in WilliamsESWSEJanFebMarAprMayJunJulAugSepOctNovDec0%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).

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

Tourism Score in Williams

Tourism Score in Williamsbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.56.50.20.2NowNowtemperaturetemperature 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 Williams for hot-weather activities is from mid June to mid July, with a peak score in the first week of July.

Beach/Pool Score in Williams

Beach/Pool Score in WilliamsJanFebMarAprMayJunJulAugSepOctNovDec002244668810103.83.80.00.0NowNowtemperaturetemperature 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 Williams typically lasts for 4.7 months (143 days), from around May 18 to around October 8, rarely starting before April 28 or after June 7, and rarely ending before September 19 or after October 29.

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

Time Spent in Various Temperature Bands and the Growing Season in Williamsgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 1850%May 1850%Oct 850%Oct 850%Jun 790%Jun 790%Sep 1990%Sep 1990%Apr 2810%Apr 2810%Oct 2910%Oct 2910%Jul 30100%Jul 30100%NowNowfreezingvery coldcoldcoolcomfortablewarmhotfrigid
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 Williams should appear around April 9, only rarely appearing before March 21 or after April 27.

Growing Degree Days in Williams

Growing Degree Days in WilliamsJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°FApr 990°FApr 990°FJul 2900°FJul 2900°FAug 241,800°FAug 241,800°FDec 312,416°FDec 312,416°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 2.5 months, from April 25 to July 10, with an average daily incident shortwave energy per square meter above 7.6 kWh. The brightest month of the year in Williams is June, with an average of 8.6 kWh.

The darker period of the year lasts for 3.2 months, from November 3 to February 11, with an average daily incident shortwave energy per square meter below 4.2 kWh. The darkest month of the year in Williams is December, with an average of 3.1 kWh.

Average Daily Incident Shortwave Solar Energy in Williams

Average Daily Incident Shortwave Solar Energy in WilliamsbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhJun 128.7 kWhJun 128.7 kWhDec 223.0 kWhDec 223.0 kWhApr 257.6 kWhApr 257.6 kWhNov 34.2 kWhNov 34.2 kWhFeb 114.2 kWhFeb 114.2 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) 3.44.45.87.28.18.67.36.56.15.03.73.1

For the purposes of this report, the geographical coordinates of Williams are 35.249 deg latitude, -112.191 deg longitude, and 6,768 ft elevation.

The topography within 2 miles of Williams contains very significant variations in elevation, with a maximum elevation change of 1,007 feet and an average elevation above sea level of 6,955 feet. Within 10 miles contains very significant variations in elevation (3,442 feet). Within 50 miles also contains extreme variations in elevation (9,514 feet).

The area within 2 miles of Williams is covered by trees (73%) and shrubs (27%), within 10 miles by trees (75%) and shrubs (24%), and within 50 miles by shrubs (62%) and trees (32%).

This report illustrates the typical weather in Williams, 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 Williams.

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