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

In Hackleburg, the summers are hot and muggy; the winters are short, very cold, and wet; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 32°F to 89°F and is rarely below 17°F or above 96°F.

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

Climate in Hackleburg

coldcoolwarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow68%68%46%46%clearovercastprecipitation: 5.3 inprecipitation: 5.3 in2.7 in2.7 inmuggy: 90%muggy: 90%0%0%drydrytourism score: 6.2tourism score: 6.20.90.9
Hackleburg weather by month. Click on each chart for more information.

The hot season lasts for 3.9 months, from May 25 to September 20, with an average daily high temperature above 81°F. The hottest month of the year in Hackleburg is July, with an average high of 89°F and low of 69°F.

The cool season lasts for 2.9 months, from November 27 to February 25, with an average daily high temperature below 58°F. The coldest month of the year in Hackleburg is January, with an average low of 32°F and high of 50°F.

Average High and Low Temperature in Hackleburg

Average High and Low Temperature in HackleburghotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 1650°FJan 1650°FJul 2189°FJul 2189°F32°F32°F70°F70°FMay 2581°FMay 2581°FSep 2081°FSep 2081°FNov 2758°FNov 2758°FFeb 2558°FFeb 2558°F61°F61°F60°F60°F39°F39°F37°F37°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 50°F55°F64°F72°F79°F86°F89°F88°F82°F72°F62°F53°F
Temp. 40°F43°F52°F60°F68°F75°F78°F77°F71°F60°F51°F43°F
Low 32°F35°F43°F50°F59°F66°F69°F68°F61°F50°F42°F36°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 Hackleburg

Average Hourly Temperature in HackleburgJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldcoldcoldcoolcoolcomfortablewarmhotvery 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.

Podgorica, Montenegro (5,424 miles away) and Luoqiao, China (7,895 miles) are the far-away foreign places with temperatures most similar to Hackleburg (view comparison).

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In Hackleburg, 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 Hackleburg begins around June 9 and lasts for 5.3 months, ending around November 18.

The clearest month of the year in Hackleburg is August, 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 18 and lasts for 6.7 months, ending around June 9.

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

Cloud Cover Categories in Hackleburg

Cloud Cover Categories in HackleburgclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Oct 368%Oct 368%Jan 446%Jan 446%Jun 957%Jun 957%Nov 1857%Nov 1857%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%51%49%43%45%42%39%34%35%34%43%51%
Clearer 47%49%51%57%55%58%61%66%65%66%57%49%

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

The wetter season lasts 8.4 months, from December 8 to August 21, with a greater than 32% chance of a given day being a wet day. The month with the most wet days in Hackleburg is July, with an average of 12.1 days with at least 0.04 inches of precipitation.

The drier season lasts 3.6 months, from August 21 to December 8. The month with the fewest wet days in Hackleburg is October, with an average of 7.3 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 Hackleburg is July, with an average of 12.1 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 41% on June 29.

Daily Chance of Precipitation in Hackleburg

Daily Chance of Precipitation in HackleburgwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 2941%Jun 2941%Oct 1022%Oct 1022%Dec 832%Dec 832%Aug 2132%Aug 2132%NowNowrainmixed
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 7.9d7.8d9.6d9.6d10.8d11.6d12.1d10.3d7.7d7.3d8.1d8.9d
Mixed 1.0d0.8d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.1d0.5d
Snow 0.4d0.3d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.1d
Any 9.3d8.9d9.8d9.6d10.8d11.6d12.1d10.3d7.7d7.3d8.2d9.5d

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. Hackleburg experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Hackleburg. The month with the most rain in Hackleburg is December, with an average rainfall of 5.1 inches.

The month with the least rain in Hackleburg is August, with an average rainfall of 2.8 inches.

Average Monthly Rainfall in Hackleburg

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 4.3″4.6″4.8″4.8″4.5″3.8″3.3″2.8″3.3″3.4″4.4″5.1″

Snowfall

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

The snowy period of the year lasts for 2.4 months, from December 17 to February 29, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Hackleburg is January, with an average snowfall of 2.4 inches.

The snowless period of the year lasts for 9.6 months, from February 29 to December 17. The least snow falls around July 12, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Hackleburg

Average Monthly Snowfall in HackleburgsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 inFeb 12.7 inFeb 12.7 inJul 120.0 inJul 120.0 inDec 171.0 inDec 171.0 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 2.4″1.9″0.3″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.9″

The length of the day in Hackleburg varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 52 minutes of daylight; the longest day is June 20, with 14 hours, 27 minutes of daylight.

Hours of Daylight and Twilight in Hackleburg

Hours of Daylight and Twilight in HackleburgJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 1912 hr, 7 minMar 1914 hr, 27 minJun 2014 hr, 27 minJun 2012 hr, 10 minSep 2212 hr, 10 minSep 229 hr, 52 minDec 219 hr, 52 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 10.2h11.0h12.0h13.1h14.0h14.4h14.2h13.4h12.4h11.3h10.4h9.9h

The earliest sunrise is at 5:38 AM on June 11, and the latest sunrise is 1 hour, 34 minutes later at 7:12 AM on November 2. The earliest sunset is at 4:41 PM on December 4, and the latest sunset is 3 hours, 26 minutes later at 8:07 PM on June 28.

Daylight saving time (DST) is observed in Hackleburg 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 Hackleburg

Sunrise & Sunset with Twilight and Daylight Saving Time in HackleburgJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 115:38 AMJun 115:38 AM8:07 PMJun 288:07 PMJun 28Dec 44:41 PMDec 44:41 PM7:12 AMNov 27:12 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 Hackleburg

Solar Elevation and Azimuth in HackleburgJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM00010101010202020303030404040505060607000010101020202020303030404040505060703279NowNow
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 Hackleburg

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.

Hackleburg experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.5 months, from May 14 to September 29, during which time the comfort level is muggy, oppressive, or miserable at least 22% of the time. The month with the most muggy days in Hackleburg is July, with 27.0 days that are muggy or worse.

The month with the fewest muggy days in Hackleburg is February, with 0.0 days that are muggy or worse.

Humidity Comfort Levels in Hackleburg

Humidity Comfort Levels in HackleburgmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 100%Feb 100%90%Jul 2290%Jul 22May 1422%May 1422%Sep 2922%Sep 2922%NowNowoppressiveoppressivemuggymuggydrydrymiserablemiserablecomfortablecomfortable
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 0.0d0.0d0.1d1.2d8.2d19.8d27.0d24.6d13.2d3.2d0.6d0.1d

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

The windier part of the year lasts for 6.6 months, from October 24 to May 12, with average wind speeds of more than 4.6 miles per hour. The windiest month of the year in Hackleburg is February, with an average hourly wind speed of 5.8 miles per hour.

The calmer time of year lasts for 5.4 months, from May 12 to October 24. The calmest month of the year in Hackleburg is July, with an average hourly wind speed of 3.4 miles per hour.

Average Wind Speed in Hackleburg

Average Wind Speed in HackleburgwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mphFeb 255.9 mphFeb 255.9 mphJul 273.3 mphJul 273.3 mphOct 244.6 mphOct 244.6 mphMay 124.6 mphMay 124.6 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) 5.55.85.85.34.43.63.43.44.14.64.95.3

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

The wind is most often from the north for 1.1 months, from January 19 to February 23 and for 4.0 weeks, from September 16 to October 14, with a peak percentage of 33% on January 29. The wind is most often from the south for 4.6 months, from February 23 to July 10; for 3.3 weeks, from July 27 to August 19; and for 3.2 months, from October 14 to January 19, with a peak percentage of 45% on May 3. The wind is most often from the east for 4.0 weeks, from August 19 to September 16, with a peak percentage of 33% on September 5.

Wind Direction in Hackleburg

Wind Direction in HackleburgSNSWSENSJanFebMarAprMayJunJulAugSepOctNovDec0%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 Hackleburg 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 Hackleburg for general outdoor tourist activities are from early May to late June and from early August to early October, with a peak score in the third week of September.

Tourism Score in Hackleburg

Tourism Score in Hackleburgbest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.26.20.90.95.95.95.35.3NowNowtemperaturetemperature 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 Hackleburg for hot-weather activities is from mid June to early September, with a peak score in the second week of August.

Beach/Pool Score in Hackleburg

Beach/Pool Score in Hackleburgbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.95.90.00.0NowNowtemperaturetemperature 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 Hackleburg typically lasts for 7.1 months (218 days), from around March 30 to around November 2, rarely starting before March 9 or after April 17, and rarely ending before October 15 or after November 22.

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

Time Spent in Various Temperature Bands and the Growing Season in Hackleburggrowing 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 250%Nov 290%Apr 1790%Apr 1790%Oct 1590%Oct 1510%Mar 910%Mar 910%Nov 2210%Nov 220%Jan 250%Jan 25Jul 14100%Jul 14100%very coldcoldcoolcomfortablewarmhotfreezing
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 Hackleburg should appear around February 18, only rarely appearing before January 30 or after March 8.

Growing Degree Days in Hackleburg

Growing Degree Days in HackleburgJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°FFeb 1887°FFeb 1887°FMay 16900°FMay 16900°FJun 251,800°FJun 251,800°FDec 314,817°FDec 314,817°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 4.8 months, from April 8 to September 2, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest month of the year in Hackleburg is June, with an average of 6.6 kWh.

The darker period of the year lasts for 2.8 months, from November 12 to February 5, with an average daily incident shortwave energy per square meter below 3.3 kWh. The darkest month of the year in Hackleburg is December, with an average of 2.6 kWh.

Average Daily Incident Shortwave Solar Energy in Hackleburg

Average Daily Incident Shortwave Solar Energy in HackleburgbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 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 242.5 kWhDec 242.5 kWhApr 85.8 kWhApr 85.8 kWhSep 25.8 kWhSep 25.8 kWhFeb 53.3 kWhFeb 53.3 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) 2.83.64.85.96.56.66.56.25.44.43.22.6

For the purposes of this report, the geographical coordinates of Hackleburg are 34.277 deg latitude, -87.829 deg longitude, and 935 ft elevation.

The topography within 2 miles of Hackleburg contains only modest variations in elevation, with a maximum elevation change of 308 feet and an average elevation above sea level of 878 feet. Within 10 miles contains only modest variations in elevation (614 feet). Within 50 miles contains significant variations in elevation (984 feet).

The area within 2 miles of Hackleburg is covered by cropland (74%) and trees (23%), within 10 miles by trees (76%) and cropland (21%), and within 50 miles by trees (65%) and cropland (25%).

This report illustrates the typical weather in Hackleburg, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Hackleburg.

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