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December Weather at Andalusia, Andalusia-Opp Municipal Airport Alabama, United States

Daily high temperatures decrease by 5°F, from 67°F to 62°F, rarely falling below 49°F or exceeding 78°F.

Daily low temperatures decrease by 4°F, from 47°F to 43°F, rarely falling below 29°F or exceeding 61°F.

For reference, on July 22, the hottest day of the year, temperatures at Andalusia, Andalusia-Opp Municipal Airport typically range from 74°F to 92°F, while on January 17, the coldest day of the year, they range from 42°F to 62°F.

Average High and Low Temperature in December at Andalusia, Andalusia-Opp Municipal Airport

Average High and Low Temperature in December at Andalusia, Andalusia-Opp Municipal AirportDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313125°F25°F30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°FNovJanDec 167°FDec 167°F47°F47°FDec 3162°FDec 3162°F43°F43°FDec 1165°FDec 1165°F45°F45°FDec 2163°FDec 2163°F44°F44°F
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.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on December. The horizontal axis is the day, 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 December at Andalusia, Andalusia-Opp Municipal Airport

Average Hourly Temperature in December at Andalusia, Andalusia-Opp Municipal AirportDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMNovJanvery coldcoldcoldcoolcomfortable
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.

Udhampur, India (7,847 miles away) and Roxby Downs, Australia (9,899 miles) are the far-away foreign places with temperatures most similar to Andalusia, Andalusia-Opp Municipal Airport (view comparison).

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The month of December at Andalusia, Andalusia-Opp Municipal Airport experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 42% to 48%.

The clearest day of the month is December 1, with clear, mostly clear, or partly cloudy conditions 58% of the time.

For reference, on July 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 54%, while on October 26, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.

Cloud Cover Categories in December at Andalusia, Andalusia-Opp Municipal Airport

Cloud Cover Categories in December at Andalusia, Andalusia-Opp Municipal AirportDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%NovJanDec 158%Dec 158%Dec 3152%Dec 3152%Dec 1154%Dec 1154%Dec 2152%Dec 2152%clearmostly 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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Andalusia, Andalusia-Opp Municipal Airport, the chance of a wet day over the course of December is essentially constant, remaining around 28% throughout.

For reference, the year's highest daily chance of a wet day is 57% on July 26, and its lowest chance is 20% on October 14.

Probability of Precipitation in December at Andalusia, Andalusia-Opp Municipal Airport

Probability of Precipitation in December at Andalusia, Andalusia-Opp Municipal AirportDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%NovJanDec 127%Dec 127%Dec 3129%Dec 3129%Dec 1128%Dec 1128%Dec 2128%Dec 2128%rain
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).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during December at Andalusia, Andalusia-Opp Municipal Airport is gradually increasing, starting the month at 4.3 inches, when it rarely exceeds 7.5 inches or falls below 1.8 inches, and ending the month at 4.5 inches, when it rarely exceeds 7.6 inches or falls below 2.0 inches.

Average Monthly Rainfall in December at Andalusia, Andalusia-Opp Municipal Airport

Average Monthly Rainfall in December at Andalusia, Andalusia-Opp Municipal AirportDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 in8 in8 inNovJanDec 14.3 inDec 14.3 inDec 314.5 inDec 314.5 inDec 114.5 inDec 114.5 inDec 214.5 inDec 214.5 in
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.

Over the course of December at Andalusia, Andalusia-Opp Municipal Airport, the length of the day is essentially constant. The shortest day of the month is December 21, with 10 hours, 7 minutes of daylight and the longest day is December 1, with 10 hours, 15 minutes of daylight.

Hours of Daylight and Twilight in December at Andalusia, Andalusia-Opp Municipal Airport

Hours of Daylight and Twilight in December at Andalusia, Andalusia-Opp Municipal AirportDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrNovJanDec 2110 hr, 7 minDec 2110 hr, 7 minnightnightdaydayDec 110 hr, 15 minDec 110 hr, 15 min
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.

The earliest sunrise of the month at Andalusia, Andalusia-Opp Municipal Airport is 6:27 AM on December 1 and the latest sunrise is 17 minutes later at 6:44 AM on December 31.

The earliest sunset is 4:42 PM on December 2 and the latest sunset is 11 minutes later at 4:53 PM on December 31.

Daylight saving time is observed at Andalusia, Andalusia-Opp Municipal Airport during 2024, but it neither starts nor ends during December, so the entire month is in daylight saving time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:41 AM and sets 14 hours, 11 minutes later, at 7:52 PM, while on December 21, the shortest day of the year, it rises at 6:40 AM and sets 10 hours, 7 minutes later, at 4:47 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in December at Andalusia, Andalusia-Opp Municipal Airport

Sunrise & Sunset with Twilight and Daylight Saving Time in December at Andalusia, Andalusia-Opp Municipal AirportDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMNovJan6:27 AM6:27 AMDec 14:42 PMDec 14:42 PM6:44 AM6:44 AMDec 314:53 PMDec 314:53 PM6:34 AM6:34 AMDec 114:43 PMDec 114:43 PM6:40 AM6:40 AMDec 214:47 PMDec 214:47 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of December. 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 December at Andalusia, Andalusia-Opp Municipal Airport

Solar Elevation and Azimuth in December at Andalusia, Andalusia-Opp Municipal AirportDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMNovJan0010102020303000101020203030
northeastsouthwest
Solar elevation and azimuth over the course of December 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 December 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in December at Andalusia, Andalusia-Opp Municipal Airport

Moon Rise, Set & Phases in December at Andalusia, Andalusia-Opp Municipal AirportDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNovJanNov 17:48 AMNov 17:48 AMNov 153:29 PMNov 153:29 PMDec 112:22 AMDec 112:22 AMDec 153:02 AMDec 153:02 AMDec 304:28 PMDec 304:28 PMJan 134:28 PMJan 134:28 PMJan 296:37 AMJan 296:37 AM7:07 AM7:07 AM5:54 PM5:54 PM4:29 PM4:29 PM7:10 AM7:10 AM6:57 AM6:57 AM4:52 PM4:52 PM3:57 PM3:57 PM7:06 AM7:06 AM6:44 AM6:44 AM4:34 PM4:34 PM4:50 PM4:50 PM7:33 AM7:33 AM6:59 AM6:59 AM5:38 PM5:38 PM
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.
Dec 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
0%6:57 AMESE4:52 PMWSW-11:54 AMS245,305 mi
2
2%7:57 AMSE5:45 PMSW-12:51 PMS243,220 mi
3
7%8:52 AMESE6:45 PMWSW-1:49 PMS241,086 mi
4
13%9:42 AMESE7:49 PMWSW-2:46 PMS238,939 mi
5
22%10:25 AMESE8:55 PMWSW-3:40 PMS236,799 mi
6
32%11:03 AMESE10:01 PMWSW-4:32 PMS234,684 mi
7
43%11:36 AMESE11:06 PMW-5:20 PMS232,631 mi
8
50%12:07 PME--6:08 PMS230,713 mi
9
66%-12:10 AMW12:37 PME6:55 PMS229,046 mi
10
77%-1:16 AMW1:08 PME7:43 PMS227,784 mi
11
86%-2:23 AMWNW1:42 PMENE8:34 PMS227,101 mi
12
93%-3:33 AMWNW2:20 PMENE9:29 PMS227,158 mi
13
98%-4:45 AMWNW3:04 PMENE10:28 PMS228,064 mi
14
100%-5:58 AMWNW3:57 PMENE11:30 PMS229,837 mi
15
100%-7:06 AMNW4:57 PMNE--
16
99%-8:07 AMWNW6:03 PMENE12:33 AMS232,383 mi
17
95%-8:58 AMWNW7:09 PMENE1:33 AMS235,500 mi
18
90%-9:40 AMWNW8:14 PMENE2:28 AMS238,914 mi
19
82%-10:15 AMWNW9:15 PMENE3:18 AMS242,328 mi
20
73%-10:45 AMWNW10:12 PME4:03 AMS245,458 mi
21
64%-11:12 AMW11:07 PME4:44 AMS248,067 mi
22
50%-11:37 AMW-5:24 AMS249,976 mi
23
45%12:01 AME12:01 PMW-6:02 AMS251,073 mi
24
35%12:55 AME12:27 PMWSW-6:41 AMS251,316 mi
25
26%1:49 AMESE12:54 PMWSW-7:22 AMS250,735 mi
26
18%2:46 AMESE1:26 PMWSW-8:06 AMS249,418 mi
27
11%3:45 AMESE2:02 PMWSW-8:53 AMS247,506 mi
28
5%4:45 AMESE2:45 PMWSW-9:45 AMS245,180 mi
29
2%5:46 AMESE3:36 PMSW-10:41 AMS242,638 mi
30
0%6:44 AMSE4:34 PMWSW-11:39 AMS240,081 mi
31
1%7:37 AMESE5:39 PMWSW-12:38 PMS237,683 mi

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy at Andalusia, Andalusia-Opp Municipal Airport is gradually decreasing during December, falling from 5% to 3% over the course of the month.

For reference, on July 22, the muggiest day of the year, there are muggy conditions 96% of the time, while on January 30, the least muggy day of the year, there are muggy conditions 1% of the time.

Humidity Comfort Levels in December at Andalusia, Andalusia-Opp Municipal Airport

Humidity Comfort Levels in December at Andalusia, Andalusia-Opp Municipal AirportDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%NovJanDec 15%Dec 15%Dec 313%Dec 313%Dec 114%Dec 114%Dec 214%Dec 214%humidhumidcomfortablecomfortabledrydrymuggymuggy
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.

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 at Andalusia, Andalusia-Opp Municipal Airport is essentially constant during December, remaining within 0.1 miles per hour of 5.0 miles per hour throughout.

For reference, on February 25, the windiest day of the year, the daily average wind speed is 5.4 miles per hour, while on August 7, the calmest day of the year, the daily average wind speed is 3.4 miles per hour.

Average Wind Speed in December at Andalusia, Andalusia-Opp Municipal Airport

Average Wind Speed in December at Andalusia, Andalusia-Opp Municipal AirportDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mphNovJanDec 14.9 mphDec 14.9 mphDec 315.0 mphDec 315.0 mphDec 115.0 mphDec 115.0 mphDec 215.0 mphDec 215.0 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction at Andalusia, Andalusia-Opp Municipal Airport throughout December is predominantly from the north, with a peak proportion of 37% on December 29.

Wind Direction in December at Andalusia, Andalusia-Opp Municipal Airport

Wind Direction in December at Andalusia, Andalusia-Opp Municipal AirportDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%NovJansoutheastnorthwest
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).

Andalusia, Andalusia-Opp Municipal Airport 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 surface water temperature at Andalusia, Andalusia-Opp Municipal Airport is gradually decreasing during December, falling by 3°F, from 69°F to 65°F, over the course of the month.

Average Water Temperature in December at Andalusia, Andalusia-Opp Municipal Airport

Average Water Temperature in December at Andalusia, Andalusia-Opp Municipal AirportDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313158°F58°F60°F60°F62°F62°F64°F64°F66°F66°F68°F68°F70°F70°F72°F72°F74°F74°F76°F76°F78°F78°FNovJanDec 169°FDec 169°FDec 3165°FDec 3165°FDec 1167°FDec 1167°FDec 2166°FDec 2166°F
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

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 at Andalusia, Andalusia-Opp Municipal Airport typically lasts for 9.7 months (294 days), from around February 20 to around December 10, rarely starting before January 28 or after March 13, and rarely ending before November 13 or after January 2.

The month of December at Andalusia, Andalusia-Opp Municipal Airport is very likely fully outside of the growing season, with the chance that a given day is in the growing season very rapidly decreasing from 67% to 12% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in December at Andalusia, Andalusia-Opp Municipal Airport

Time Spent in Various Temperature Bands and the Growing Season in December at Andalusia, Andalusia-Opp Municipal AirportDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%NovJan67%Dec 167%Dec 1Dec 3112%Dec 3112%Dec 1148%Dec 1148%Dec 2129%Dec 2129%90%Nov 1390%Nov 13very coldcoldcoolcomfortablewarmfreezing
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.

The average accumulated growing degree days at Andalusia, Andalusia-Opp Municipal Airport are increasing during December, increasing by 202°F, from 6,437°F to 6,638°F, over the course of the month.

Growing Degree Days in December at Andalusia, Andalusia-Opp Municipal Airport

Growing Degree Days in December at Andalusia, Andalusia-Opp Municipal AirportDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031316,200°F6,200°F6,300°F6,300°F6,400°F6,400°F6,500°F6,500°F6,600°F6,600°F6,700°F6,700°F6,800°F6,800°F6,900°F6,900°F7,000°F7,000°FNovJanDec 16,437°FDec 16,437°FDec 316,638°FDec 316,638°FDec 116,512°FDec 116,512°FDec 216,577°FDec 216,577°F
The average growing degree days accumulated over the course of December, 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 at Andalusia, Andalusia-Opp Municipal Airport is essentially constant during December, remaining within 0.2 kWh of 3.0 kWh throughout.

The lowest average daily incident shortwave solar energy during December is 2.9 kWh on December 22.

Average Daily Incident Shortwave Solar Energy in December at Andalusia, Andalusia-Opp Municipal Airport

Average Daily Incident Shortwave Solar Energy in December at Andalusia, Andalusia-Opp Municipal AirportDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 kWh0.0 kWh0.5 kWh0.5 kWh1.0 kWh1.0 kWh1.5 kWh1.5 kWh2.0 kWh2.0 kWh2.5 kWh2.5 kWh3.0 kWh3.0 kWh3.5 kWh3.5 kWh4.0 kWh4.0 kWh4.5 kWh4.5 kWh5.0 kWh5.0 kWhNovJanDec 222.9 kWhDec 222.9 kWhDec 13.2 kWhDec 13.2 kWhDec 113.0 kWhDec 113.0 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Andalusia, Andalusia-Opp Municipal Airport are 31.300 deg latitude, -86.383 deg longitude, and 302 ft elevation.

The topography within 2 miles of Andalusia, Andalusia-Opp Municipal Airport contains only modest variations in elevation, with a maximum elevation change of 138 feet and an average elevation above sea level of 285 feet. Within 10 miles also contains only modest variations in elevation (305 feet). Within 50 miles contains only modest variations in elevation (646 feet).

The area within 2 miles of Andalusia, Andalusia-Opp Municipal Airport is covered by cropland (51%) and trees (46%), within 10 miles by trees (53%) and cropland (40%), and within 50 miles by trees (73%) and cropland (21%).

This report illustrates the typical weather at Andalusia, Andalusia-Opp Municipal Airport, 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

Andalusia, Andalusia-Opp Municipal Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back include but are not limited to Florala Municipal Airport; Bob Sikes Airport; Mac Crenshaw Memorial Airport; Fort Rucker, Lowe Army Heliport; Middleton Field; Duke Field; Troy Municipal Airport; and Cairns Army Airfield (Fort Rucker).

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.

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