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Climate and Average Weather Year Round in Ad Dānā Syria

In Ad Dānā, the summers are long, hot, arid, and clear and the winters are cold and partly cloudy. Over the course of the year, the temperature typically varies from 36°F to 96°F and is rarely below 27°F or above 102°F.

Based on the beach/pool score, the best time of year to visit Ad Dānā for hot-weather activities is from early June to late September.

Climate in Ad Dānā

coldcoolwarmhothotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow100%100%54%54%clearovercastprecipitation: 2.4 inprecipitation: 2.4 in0.1 in0.1 inmuggy: 42%muggy: 42%0%0%drydrybeach/pool score: 8.8beach/pool score: 8.80.00.0
Ad Dānā weather by month. Click on each chart for more information.

The hot season lasts for 4.0 months, from May 28 to September 27, with an average daily high temperature above 87°F. The hottest month of the year in Ad Dānā is August, with an average high of 95°F and low of 72°F.

The cool season lasts for 3.3 months, from November 28 to March 6, with an average daily high temperature below 60°F. The coldest month of the year in Ad Dānā is January, with an average low of 36°F and high of 51°F.

Average High and Low Temperature in Ad Dānā

Average High and Low Temperature in Ad DānāhotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FJan 2452°FJan 2452°FAug 196°FAug 196°F36°F36°F73°F73°FMay 2887°FMay 2887°FSep 2787°FSep 2787°FNov 2860°FNov 2860°FMar 660°FMar 660°F61°F61°F61°F61°F40°F40°F41°F41°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 51°F55°F63°F73°F83°F91°F95°F95°F90°F80°F65°F54°F
Temp. 43°F46°F53°F61°F70°F78°F83°F83°F77°F67°F53°F45°F
Low 36°F38°F43°F50°F58°F66°F72°F72°F65°F54°F44°F38°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 Ad Dānā

Average Hourly Temperature in Ad DānāJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldvery coldcoldcoldcoolcoolcomfortablewarmwarmhotvery cold
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.

Muenster, Texas, United States (6,783 miles away) is the far-away foreign place with temperatures most similar to Ad Dānā (view comparison).

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In Ad Dānā, 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 Ad Dānā begins around May 13 and lasts for 4.9 months, ending around October 10.

The clearest month of the year in Ad Dānā is July, during which on average the sky is clear, mostly clear, or partly cloudy 100% of the time.

The cloudier part of the year begins around October 10 and lasts for 7.1 months, ending around May 13.

The cloudiest month of the year in Ad Dānā is January, during which on average the sky is overcast or mostly cloudy 44% of the time.

Cloud Cover Categories in Ad Dānā

Cloud Cover Categories in Ad DānāclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 1100%Aug 1100%Dec 2354%Dec 2354%May 1377%May 1377%Oct 1077%Oct 1077%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 44%42%38%33%21%4%0%0%6%26%37%44%
Clearer 56%58%62%67%79%96%100%100%94%74%63%56%

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

The wetter season lasts 6.3 months, from October 15 to April 24, with a greater than 15% chance of a given day being a wet day. The month with the most wet days in Ad Dānā is February, with an average of 8.0 days with at least 0.04 inches of precipitation.

The drier season lasts 5.7 months, from April 24 to October 15. The month with the fewest wet days in Ad Dānā is July, with an average of 0.4 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 Ad Dānā is February, with an average of 7.8 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 29% on February 4.

Daily Chance of Precipitation in Ad Dānā

Daily Chance of Precipitation in Ad DānāwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 429%Feb 429%Jul 161%Jul 161%Oct 1515%Oct 1515%Apr 2415%Apr 2415%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 8.3d7.8d7.1d4.9d2.9d1.2d0.4d0.7d1.9d4.8d6.3d7.5d
Mixed 0.1d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d
Any 8.5d8.0d7.1d4.9d2.9d1.2d0.4d0.7d1.9d4.8d6.3d7.6d

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. Ad Dānā experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.9 months, from September 22 to May 19, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Ad Dānā is February, with an average rainfall of 2.3 inches.

The rainless period of the year lasts for 4.1 months, from May 19 to September 22. The month with the least rain in Ad Dānā is July, with an average rainfall of 0.1 inches.

Average Monthly Rainfall in Ad Dānā

Average Monthly Rainfall in Ad DānārainrainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 inJan 312.4 inJan 312.4 inJul 230.1 inJul 230.1 inSep 220.5 inSep 220.5 inMay 190.5 inMay 190.5 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 2.2″2.3″1.6″1.1″0.6″0.3″0.1″0.1″0.4″1.2″1.8″2.2″

The length of the day in Ad Dānā varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 42 minutes of daylight; the longest day is June 20, with 14 hours, 38 minutes of daylight.

Hours of Daylight and Twilight in Ad Dānā

Hours of Daylight and Twilight in Ad DānāJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2014 hr, 38 minJun 2014 hr, 38 minJun 2012 hr, 8 minSep 2212 hr, 8 minSep 229 hr, 42 minDec 219 hr, 42 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 10.0h10.9h12.0h13.1h14.1h14.6h14.3h13.5h12.4h11.2h10.2h9.7h

The earliest sunrise is at 5:15 AM on June 12, and the latest sunrise is 2 hours, 30 minutes later at 7:44 AM on January 7. The earliest sunset is at 5:17 PM on December 5, and the latest sunset is 2 hours, 36 minutes later at 7:54 PM on June 28.

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

Sunrise & Sunset with Twilight in Ad Dānā

Sunrise & Sunset with Twilight in Ad DānāJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 125:15 AMJun 125:15 AM7:54 PMJun 287:54 PMJun 28Dec 55:17 PMDec 55:17 PM7:44 AMJan 77:44 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 Ad Dānā

Solar Elevation and Azimuth in Ad DānāJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM000010101010202020203030303040404050505060607000001010101020202020303030304040405050607077NowNow
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 Ad Dānā

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.

Ad Dānā experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 2.7 months, from June 25 to September 15, during which time the comfort level is muggy, oppressive, or miserable at least 11% of the time. The month with the most muggy days in Ad Dānā is August, with 11.5 days that are muggy or worse.

The least muggy day of the year is February 9, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Ad Dānā

Humidity Comfort Levels in Ad DānāmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 90%Feb 90%Aug 442%Aug 442%Jun 2511%Jun 2511%Sep 1511%Sep 1511%NowNowmuggymuggyhumidhumiddrydrycomfortablecomfortableoppressiveoppressive
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 0.0d0.0d0.0d0.0d0.1d1.7d9.6d11.5d3.4d0.2d0.0d0.0d

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 Ad Dānā experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 2.9 months, from June 4 to September 1, with average wind speeds of more than 7.1 miles per hour. The windiest month of the year in Ad Dānā is July, with an average hourly wind speed of 8.6 miles per hour.

The calmer time of year lasts for 9.1 months, from September 1 to June 4. The calmest month of the year in Ad Dānā is October, with an average hourly wind speed of 5.7 miles per hour.

Average Wind Speed in Ad Dānā

Average Wind Speed in Ad DānāwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphJul 148.7 mphJul 148.7 mphOct 135.6 mphOct 135.6 mphJun 47.1 mphJun 47.1 mphSep 17.1 mphSep 17.1 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) 7.06.76.36.26.47.78.67.96.45.76.36.9

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

The wind is most often from the west for 7.5 months, from March 4 to October 18, with a peak percentage of 95% on July 26. The wind is most often from the east for 4.5 months, from October 18 to March 4, with a peak percentage of 63% on January 1.

Wind Direction in Ad Dānā

Wind Direction in Ad DānāEWEJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwesteastnorthsouth
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).

Ad Dānā 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 3.4 months, from June 29 to October 11, with an average temperature above 79°F. The month of the year in Ad Dānā with the warmest water is August, with an average temperature of 83°F.

The time of year with cooler water lasts for 4.1 months, from December 23 to April 25, with an average temperature below 66°F. The month of the year in Ad Dānā with the coolest water is February, with an average temperature of 62°F.

Average Water Temperature in Ad Dānā

Average Water Temperature in Ad DānāwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°FAug 2084°FAug 2084°F62°FFeb 2762°FFeb 27Jun 2979°FJun 2979°FOct 1179°FOct 1179°FDec 2366°FDec 2366°FApr 2566°FApr 2566°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 64°F62°F62°F65°F70°F77°F81°F83°F83°F78°F72°F67°F

To characterize how pleasant the weather is in Ad Dānā 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 times of year to visit Ad Dānā for general outdoor tourist activities are from late April to late June and from early September to late October, with a peak score in the first week of October.

Tourism Score in Ad Dānā

Tourism Score in Ad Dānābest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.87.80.70.77.87.85.65.6NowNow 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 Ad Dānā for hot-weather activities is from early June to late September, with a peak score in the last week of June.

Beach/Pool Score in Ad Dānā

Beach/Pool Score in Ad Dānābest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810108.88.80.00.08.88.88.38.3NowNowtemperaturetemperature 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 Ad Dānā typically lasts for 9.2 months (277 days), from around February 28 to around December 1, rarely starting before February 3 or after March 27, and rarely ending before November 9 or after December 30.

Time Spent in Various Temperature Bands and the Growing Season in Ad Dānā

Time Spent in Various Temperature Bands and the Growing Season in Ad Dānāgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Feb 2850%Feb 2850%Dec 150%Dec 190%Mar 2790%Mar 2790%Nov 990%Nov 910%Feb 310%Feb 310%Dec 3010%Dec 301%Jan 161%Jan 16Jul 26100%Jul 26100%NowNowvery 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 Ad Dānā should appear around March 5, only rarely appearing before February 23 or after March 24.

Growing Degree Days in Ad Dānā

Growing Degree Days in Ad DānāJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°FMar 583°FMar 583°FMay 18900°FMay 18900°FDec 315,404°FDec 315,404°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 3.3 months, from May 13 to August 23, with an average daily incident shortwave energy per square meter above 7.3 kWh. The brightest month of the year in Ad Dānā is June, with an average of 8.4 kWh.

The darker period of the year lasts for 3.5 months, from November 2 to February 16, with an average daily incident shortwave energy per square meter below 3.5 kWh. The darkest month of the year in Ad Dānā is December, with an average of 2.4 kWh.

Average Daily Incident Shortwave Solar Energy in Ad Dānā

Average Daily Incident Shortwave Solar Energy in Ad DānābrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhJun 288.5 kWhJun 288.5 kWhDec 222.3 kWhDec 222.3 kWhMay 137.3 kWhMay 137.3 kWhAug 237.3 kWhAug 237.3 kWhNov 23.5 kWhNov 23.5 kWhFeb 163.5 kWhFeb 163.5 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) 2.63.54.86.27.48.48.37.56.24.43.12.4

For the purposes of this report, the geographical coordinates of Ad Dānā are 36.213 deg latitude, 36.770 deg longitude, and 1,312 ft elevation.

The topography within 2 miles of Ad Dānā contains only modest variations in elevation, with a maximum elevation change of 262 feet and an average elevation above sea level of 1,307 feet. Within 10 miles contains only modest variations in elevation (2,388 feet). Within 50 miles contains large variations in elevation (7,303 feet).

The area within 2 miles of Ad Dānā is covered by cropland (57%), shrubs (19%), grassland (14%), and trees (10%), within 10 miles by cropland (64%) and grassland (15%), and within 50 miles by cropland (59%) and trees (15%).

This report illustrates the typical weather in Ad Dānā, 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 Ad Dānā.

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