1. WeatherSpark.com
  2. United States
  3. Arkansas

Climate and Average Weather Year Round in Little Rock Arkansas, United States

In Little Rock, 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 34°F to 93°F and is rarely below 21°F or above 100°F.

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

Climate in Little Rock

coldcoolwarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow71%71%51%51%clearovercastprecipitation: 5.0 inprecipitation: 5.0 in2.4 in2.4 inmuggy: 90%muggy: 90%0%0%drydrytourism score: 6.4tourism score: 6.41.01.0
Little Rock weather by month. Click on each chart for more information.

The hot season lasts for 3.7 months, from May 29 to September 20, with an average daily high temperature above 84°F. The hottest month of the year in Little Rock is July, with an average high of 92°F and low of 73°F.

The cool season lasts for 2.9 months, from November 27 to February 24, with an average daily high temperature below 59°F. The coldest month of the year in Little Rock is January, with an average low of 34°F and high of 51°F.

Average High and Low Temperature in Little Rock

Average High and Low Temperature in Little RockhotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 1651°FJan 1651°FJul 2293°FJul 2293°F34°F34°F74°F74°FMay 2984°FMay 2984°FSep 2084°FSep 2084°FNov 2759°FNov 2759°FFeb 2459°FFeb 2459°F66°F66°F64°F64°F41°F41°F39°F39°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 51°F56°F65°F73°F81°F89°F92°F92°F85°F74°F63°F53°F
Temp. 41°F45°F54°F62°F71°F79°F82°F81°F74°F63°F52°F43°F
Low 34°F37°F45°F53°F62°F70°F73°F72°F65°F54°F44°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 Little Rock

Average Hourly Temperature in Little RockJanFebMarAprMayJunJulAugSepOctNovDec12 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 (6,530 miles away); Gorgān, Iran (7,056 miles); and Hetang, China (7,732 miles) are the far-away foreign places with temperatures most similar to Little Rock (view comparison).

Map
Marker
© OpenStreetMap contributors

Compare Little Rock to another city:

Map

In Little Rock, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year in Little Rock begins around June 12 and lasts for 4.9 months, ending around November 9.

The clearest month of the year in Little Rock is August, during which on average the sky is clear, mostly clear, or partly cloudy 69% of the time.

The cloudier part of the year begins around November 9 and lasts for 7.1 months, ending around June 12.

The cloudiest month of the year in Little Rock is February, during which on average the sky is overcast or mostly cloudy 48% of the time.

Cloud Cover Categories in Little Rock

Cloud Cover Categories in Little RockclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Oct 571%Oct 571%Mar 151%Mar 151%Jun 1261%Jun 1261%Nov 961%Nov 961%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 48%48%46%41%43%38%33%31%31%33%42%48%
Clearer 52%52%54%59%57%62%67%69%69%67%58%52%

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

The wetter season lasts 4.7 months, from March 15 to August 5, with a greater than 31% chance of a given day being a wet day. The month with the most wet days in Little Rock is May, with an average of 11.8 days with at least 0.04 inches of precipitation.

The drier season lasts 7.3 months, from August 5 to March 15. The month with the fewest wet days in Little Rock is January, 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 Little Rock is May, with an average of 11.8 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 40% on May 15.

Daily Chance of Precipitation in Little Rock

Daily Chance of Precipitation in Little RockwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%May 1540%May 1540%Jan 1223%Jan 1223%Jan 123%Jan 123%Mar 1531%Mar 1531%Aug 531%Aug 531%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 6.1d6.7d9.4d10.2d11.8d9.8d9.7d8.3d7.5d7.8d8.1d7.3d
Mixed 0.7d0.6d0.2d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.4d
Snow 0.5d0.3d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.3d
Any 7.3d7.6d9.7d10.2d11.8d9.8d9.7d8.3d7.5d7.8d8.1d8.0d

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. Little Rock experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Little Rock. The month with the most rain in Little Rock is April, with an average rainfall of 4.8 inches.

The month with the least rain in Little Rock is August, with an average rainfall of 2.4 inches.

Average Monthly Rainfall in Little Rock

Average Monthly Rainfall in Little RockJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inMay 15.0 inMay 15.0 inAug 232.4 inAug 232.4 inNov 284.9 inNov 284.9 inJan 243.0 inJan 243.0 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 3.1″3.5″4.3″4.8″4.5″3.0″2.6″2.4″2.8″3.8″4.6″4.5″

Snowfall

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

The snowy period of the year lasts for 2.6 months, from December 9 to February 27, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Little Rock is January, with an average snowfall of 2.0 inches.

The snowless period of the year lasts for 9.5 months, from February 27 to December 9. The least snow falls around July 24, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Little Rock

Average Monthly Snowfall in Little RocksnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 inJan 62.2 inJan 62.2 inJul 240.0 inJul 240.0 inDec 91.0 inDec 91.0 inFeb 271.0 inFeb 271.0 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 2.0″1.5″0.4″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.1″1.4″

The length of the day in Little Rock varies significantly over the course of the year. In 2023, the shortest day is December 21, with 9 hours, 49 minutes of daylight; the longest day is June 21, with 14 hours, 29 minutes of daylight.

Hours of Daylight and Twilight in Little Rock

Hours of Daylight and Twilight in Little RockJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 2012 hr, 8 minMar 2014 hr, 29 minJun 2114 hr, 29 minJun 2112 hr, 9 minSep 2312 hr, 9 minSep 239 hr, 49 minDec 219 hr, 49 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 10.1h11.0h12.0h13.1h14.0h14.5h14.2h13.4h12.3h11.3h10.3h9.9h

The earliest sunrise is at 5:55 AM on June 12, and the latest sunrise is 1 hour, 37 minutes later at 7:32 AM on November 4. The earliest sunset is at 4:57 PM on December 5, and the latest sunset is 3 hours, 29 minutes later at 8:26 PM on June 29.

Daylight saving time (DST) is observed in Little Rock during 2023, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time in Little Rock

Sunrise & Sunset with Twilight and Daylight Saving Time in Little RockJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 125:55 AMJun 125:55 AM8:26 PMJun 298:26 PMJun 29Dec 54:57 PMDec 54:57 PM7:32 AMNov 47:32 AMNov 4Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2023. 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 Little Rock

Solar Elevation and Azimuth in Little RockJanFebMarAprMayJunJulAugSepOctNovDec12 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 2023. 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 2023. 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 Little Rock

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.

Little Rock experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.8 months, from May 8 to October 2, 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 Little Rock is July, with 27.2 days that are muggy or worse.

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

Humidity Comfort Levels in Little Rock

Humidity Comfort Levels in Little RockmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 130%Jan 130%90%Jul 2290%Jul 22May 822%May 822%Oct 222%Oct 222%NowNowmiserablemiserableoppressiveoppressivedrydrymuggymuggyhumidhumid
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 0.0d0.0d0.3d2.4d11.0d21.8d27.2d24.8d13.6d3.8d0.8d0.2d

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 Little Rock experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 7.0 months, from October 19 to May 19, with average wind speeds of more than 6.1 miles per hour. The windiest month of the year in Little Rock is March, with an average hourly wind speed of 7.4 miles per hour.

The calmer time of year lasts for 5.0 months, from May 19 to October 19. The calmest month of the year in Little Rock is July, with an average hourly wind speed of 4.9 miles per hour.

Average Wind Speed in Little Rock

Average Wind Speed in Little RockwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphApr 17.5 mphApr 17.5 mphJul 284.7 mphJul 284.7 mphOct 196.1 mphOct 196.1 mphMay 196.1 mphMay 196.1 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) 6.87.17.47.26.25.34.94.95.66.16.56.6

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

The wind is most often from the south for 5.5 months, from February 20 to August 5 and for 2.9 months, from October 1 to December 28, with a peak percentage of 46% on May 18. The wind is most often from the east for 1.9 months, from August 5 to October 1, with a peak percentage of 39% on September 6. The wind is most often from the north for 1.7 months, from December 28 to February 20, with a peak percentage of 31% on January 1.

Wind Direction in Little Rock

Wind Direction in Little RockNSESJanFebMarAprMayJunJulAugSepOctNovDec0%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 Little Rock 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 Little Rock for general outdoor tourist activities are from early May to early June and from late August to mid October, with a peak score in the third week of September.

Tourism Score in Little Rock

Tourism Score in Little Rockbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.46.41.01.06.06.05.15.1NowNowprecipitationprecipitationcloudscloudstemperaturetemperature tourism 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 Little Rock 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 Little Rock

Beach/Pool Score in Little Rockbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.36.30.10.16.26.2NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/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 Little Rock typically lasts for 8.1 months (249 days), from around March 12 to around November 16, rarely starting before February 21 or after April 3, and rarely ending before October 28 or after December 5.

Time Spent in Various Temperature Bands and the Growing Season in Little Rock

Time Spent in Various Temperature Bands and the Growing Season in Little Rockgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 1250%Mar 1250%Nov 1650%Nov 1690%Apr 390%Apr 390%Oct 2890%Oct 2810%Feb 2110%Feb 2110%Dec 510%Dec 5Jul 16100%Jul 16100%freezingvery coldcoldcoolcomfortablewarmhotsweltering
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 Little Rock should appear around February 12, only rarely appearing before January 27 or after March 2.

Growing Degree Days in Little Rock

Growing Degree Days in Little RockJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°FFeb 1287°FFeb 1287°FMay 8900°FMay 8900°FDec 315,461°FDec 315,461°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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.6 months, from April 13 to August 31, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest month of the year in Little Rock is June, with an average of 6.7 kWh.

The darker period of the year lasts for 2.9 months, from November 10 to February 5, with an average daily incident shortwave energy per square meter below 3.3 kWh. The darkest month of the year in Little Rock is December, with an average of 2.5 kWh.

Average Daily Incident Shortwave Solar Energy in Little Rock

Average Daily Incident Shortwave Solar Energy in Little RockbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 216.8 kWhJun 216.8 kWhDec 232.5 kWhDec 232.5 kWhApr 135.9 kWhApr 135.9 kWhAug 315.9 kWhAug 315.9 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) 2.83.74.86.06.46.76.76.35.44.33.12.5

For the purposes of this report, the geographical coordinates of Little Rock are 34.746 deg latitude, -92.290 deg longitude, and 318 ft elevation.

The topography within 2 miles of Little Rock contains only modest variations in elevation, with a maximum elevation change of 331 feet and an average elevation above sea level of 306 feet. Within 10 miles contains only modest variations in elevation (640 feet). Within 50 miles contains significant variations in elevation (1,716 feet).

The area within 2 miles of Little Rock is covered by artificial surfaces (92%), within 10 miles by artificial surfaces (46%) and trees (28%), and within 50 miles by trees (45%) and cropland (39%).

This report illustrates the typical weather in Little Rock, 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 Little Rock.

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