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Climate and Average Weather Year Round in Birmingham Alabama, United States

In Birmingham, the summers are long, hot, and muggy; the winters are short, cold, and wet; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 36°F to 90°F and is rarely below 21°F or above 97°F.

Based on the tourism score, the best times of year to visit Birmingham for warm-weather activities are from late April to early June and from late August to mid October.

Climate in Birmingham

coldcoolcomfortablewarmhotwarmcoolJanFebMarAprMayJunJulAugSepOctNovDecNowNow67%67%46%46%clearovercastprecipitation: 5.2 inprecipitation: 5.2 in2.9 in2.9 inmuggy: 90%muggy: 90%0%0%drydrytourism score: 6.4tourism score: 6.41.31.3
Birmingham weather by month. Click on each chart for more information.

The hot season lasts for 3.9 months, from May 24 to September 21, with an average daily high temperature above 83°F. The hottest month of the year in Birmingham is July, with an average high of 90°F and low of 72°F.

The cool season lasts for 2.9 months, from November 28 to February 24, with an average daily high temperature below 61°F. The coldest month of the year in Birmingham is January, with an average low of 36°F and high of 54°F.

Average High and Low Temperature in Birmingham

Average High and Low Temperature in BirminghamhotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 1754°FJan 1754°FJul 2290°FJul 2290°F36°F36°F72°F72°FMay 2483°FMay 2483°FSep 2183°FSep 2183°FNov 2861°FNov 2861°FFeb 2461°FFeb 2461°F63°F63°F64°F64°F42°F42°F40°F40°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 54°F59°F67°F74°F81°F87°F90°F89°F84°F75°F65°F57°F
Temp. 44°F47°F55°F63°F71°F77°F80°F80°F74°F63°F54°F46°F
Low 36°F39°F46°F53°F61°F69°F72°F71°F65°F54°F45°F39°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 Birmingham

Average Hourly Temperature in BirminghamJanFebMarAprMayJunJulAugSepOctNovDec12 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.

Tepehan, Turkey (6,388 miles away) and Baiyun, China (7,998 miles) are the far-away foreign places with temperatures most similar to Birmingham (view comparison).

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In Birmingham, 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 Birmingham begins around July 13 and lasts for 4.3 months, ending around November 23.

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

The cloudier part of the year begins around November 23 and lasts for 7.7 months, ending around July 13.

The cloudiest month of the year in Birmingham is January, during which on average the sky is overcast or mostly cloudy 53% of the time.

Cloud Cover Categories in Birmingham

Cloud Cover Categories in BirminghamclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Oct 1167%Oct 1167%Jan 546%Jan 546%Jul 1356%Jul 1356%Nov 2357%Nov 2357%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 53%52%49%43%43%43%43%37%36%34%42%51%
Clearer 47%48%51%57%57%57%57%63%64%66%58%49%

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

The wetter season lasts 4.9 months, from March 28 to August 24, with a greater than 32% chance of a given day being a wet day. The month with the most wet days in Birmingham is July, with an average of 13.0 days with at least 0.04 inches of precipitation.

The drier season lasts 7.1 months, from August 24 to March 28. The month with the fewest wet days in Birmingham is October, with an average of 6.7 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 Birmingham is July, with an average of 13.0 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 44% on July 8.

Daily Chance of Precipitation in Birmingham

Daily Chance of Precipitation in BirminghamwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 844%Jul 844%Oct 720%Oct 720%Mar 2832%Mar 2832%Aug 2432%Aug 2432%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 9.0d8.6d9.6d9.5d10.5d12.1d13.0d10.9d7.6d6.7d8.1d9.0d
Mixed 0.3d0.3d0.2d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.2d
Snow 0.3d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d
Any 9.6d9.0d9.8d9.5d10.5d12.1d13.0d10.9d7.6d6.7d8.1d9.2d

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. Birmingham experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Birmingham. The month with the most rain in Birmingham is February, with an average rainfall of 5.0 inches.

The month with the least rain in Birmingham is August, with an average rainfall of 2.9 inches.

Average Monthly Rainfall in Birmingham

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 4.5″5.0″5.0″4.3″3.8″3.6″3.5″2.9″3.2″3.0″4.1″4.5″

Snowfall

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

The snowy period of the year lasts for 2.1 weeks, from January 9 to January 24, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Birmingham is January, with an average snowfall of 1.1 inches.

The snowless period of the year lasts for 12 months, from January 24 to January 9. The least snow falls around August 1, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Birmingham

Average Monthly Snowfall in BirminghamJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 inJan 191.1 inJan 191.1 inAug 10.0 inAug 10.0 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 1.1″0.4″0.2″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.3″

The length of the day in Birmingham varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 56 minutes of daylight; the longest day is June 20, with 14 hours, 23 minutes of daylight.

Hours of Daylight and Twilight in Birmingham

Hours of Daylight and Twilight in BirminghamJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 1912 hr, 7 minMar 1914 hr, 23 minJun 2014 hr, 23 minJun 2012 hr, 9 minSep 2212 hr, 9 minSep 229 hr, 56 minDec 219 hr, 56 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 10.2h11.0h12.0h13.1h13.9h14.3h14.1h13.3h12.3h11.3h10.4h10.0h

The earliest sunrise is at 5:36 AM on June 11, and the latest sunrise is 1 hour, 31 minutes later at 7:07 AM on November 2. The earliest sunset is at 4:38 PM on December 3, and the latest sunset is 3 hours, 22 minutes later at 8:01 PM on June 29.

Daylight saving time (DST) is observed in Birmingham 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 Birmingham

Sunrise & Sunset with Twilight and Daylight Saving Time in BirminghamJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 115:36 AMJun 115:36 AM8:01 PMJun 298:01 PMJun 29Dec 34:38 PMDec 34:38 PM7:07 AMNov 27:07 AMNov 2Mar 10DSTMar 10DSTDSTNov 3DSTNov 3daynightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 Birmingham

Solar Elevation and Azimuth in BirminghamJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM00010101010202020303030404040505060607000010101020202020303030404040505060703380NowNow
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 Birmingham

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.

Birmingham experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.7 months, from May 12 to October 2, during which time the comfort level is muggy, oppressive, or miserable at least 23% of the time. The month with the most muggy days in Birmingham is July, with 26.9 days that are muggy or worse.

The month with the fewest muggy days in Birmingham is January, with 0.1 days that are muggy or worse.

Humidity Comfort Levels in Birmingham

Humidity Comfort Levels in BirminghammuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 170%Jan 170%90%Jul 2490%Jul 24May 1223%May 1223%Oct 223%Oct 223%NowNowoppressiveoppressivemuggymuggydrydryhumidhumidcomfortablecomfortablemiserablemiserable
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 0.1d0.1d0.3d1.5d9.1d20.2d26.9d25.0d14.2d3.9d1.0d0.3d

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

The windier part of the year lasts for 7.2 months, from October 6 to May 13, with average wind speeds of more than 4.1 miles per hour. The windiest month of the year in Birmingham is March, with an average hourly wind speed of 5.1 miles per hour.

The calmer time of year lasts for 4.8 months, from May 13 to October 6. The calmest month of the year in Birmingham is July, with an average hourly wind speed of 3.2 miles per hour.

Average Wind Speed in Birmingham

Average Wind Speed in BirminghamwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mphFeb 265.2 mphFeb 265.2 mphJul 273.1 mphJul 273.1 mphOct 64.1 mphOct 64.1 mphMay 134.1 mphMay 134.1 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) 4.85.05.14.84.13.53.23.23.84.24.54.6

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

The wind is most often from the south for 4.3 months, from February 26 to July 3; for 3.3 weeks, from July 26 to August 18; and for 1.2 months, from November 10 to December 16, with a peak percentage of 45% on May 3. The wind is most often from the east for 1.5 months, from August 18 to October 3, with a peak percentage of 36% on September 14. The wind is most often from the north for 1.2 months, from October 3 to November 10 and for 2.4 months, from December 16 to February 26, with a peak percentage of 33% on October 11.

Wind Direction in Birmingham

Wind Direction in BirminghamNSWSENSNJanFebMarAprMayJunJulAugSepOctNovDec0%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 Birmingham 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 Birmingham for general outdoor tourist activities are from late April to early June and from late August to mid October, with a peak score in the last week of September.

Tourism Score in Birmingham

Tourism Score in Birminghambest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.46.41.31.36.16.14.94.9NowNowtemperaturetemperature 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 Birmingham for hot-weather activities is from early June to mid September, with a peak score in the last week of August.

Beach/Pool Score in Birmingham

Beach/Pool Score in Birminghambest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.36.30.10.1NowNowtemperaturetemperature 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 Birmingham typically lasts for 7.7 months (235 days), from around March 22 to around November 12, rarely starting before February 26 or after April 14, and rarely ending before October 24 or after November 30.

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

Time Spent in Various Temperature Bands and the Growing Season in Birminghamgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 2250%Mar 2250%Nov 1250%Nov 1290%Apr 1490%Apr 1490%Oct 2490%Oct 2410%Feb 2610%Feb 2610%Nov 3010%Nov 30Jul 22100%Jul 22100%NowNowfreezingvery coldcoldcoolcomfortablewarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

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

Based on growing degree days alone, the first spring blooms in Birmingham should appear around February 4, only rarely appearing before January 19 or after February 24.

Growing Degree Days in Birmingham

Growing Degree Days in BirminghamJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°FFeb 488°FFeb 488°FMay 3900°FMay 3900°FJun 121,800°FJun 121,800°FDec 315,551°FDec 315,551°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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.7 months, from April 8 to August 29, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest month of the year in Birmingham is May, with an average of 6.6 kWh.

The darker period of the year lasts for 2.7 months, from November 13 to February 4, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest month of the year in Birmingham is December, with an average of 2.6 kWh.

Average Daily Incident Shortwave Solar Energy in Birmingham

Average Daily Incident Shortwave Solar Energy in BirminghambrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 46.6 kWhJun 46.6 kWhDec 232.5 kWhDec 232.5 kWhApr 85.8 kWhApr 85.8 kWhAug 295.8 kWhAug 295.8 kWhFeb 43.4 kWhFeb 43.4 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) 2.93.74.96.16.66.66.46.15.44.43.32.6

For the purposes of this report, the geographical coordinates of Birmingham are 33.521 deg latitude, -86.802 deg longitude, and 610 ft elevation.

The topography within 2 miles of Birmingham contains significant variations in elevation, with a maximum elevation change of 594 feet and an average elevation above sea level of 621 feet. Within 10 miles contains significant variations in elevation (883 feet). Within 50 miles also contains very significant variations in elevation (1,781 feet).

The area within 2 miles of Birmingham is covered by artificial surfaces (100%), within 10 miles by artificial surfaces (65%) and trees (31%), and within 50 miles by trees (70%) and cropland (15%).

This report illustrates the typical weather in Birmingham, 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 Birmingham.

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