1. WeatherSpark.com
  2. Chile
  3. Aisén

Climate and Average Weather Year Round in Coihaique Chile

In Coihaique, the summers are cool; the winters are short, very cold, and wet; and it is mostly cloudy year round. Over the course of the year, the temperature typically varies from 30°F to 64°F and is rarely below 18°F or above 76°F.

Based on the tourism score, the best time of year to visit Coihaique for warm-weather activities is from late December to late February.

Climate in Coihaique

coolcoldvery coldcoldcoolJanFebMarAprMayJunJulAugSepOctNovDecNowNow46%46%23%23%overcastclearprecipitation: 3.4 inprecipitation: 3.4 in1.5 in1.5 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 3.7tourism score: 3.70.00.0
Coihaique weather by month. Click on each chart for more information.

The warm season lasts for 3.3 months, from December 8 to March 18, with an average daily high temperature above 59°F. The hottest month of the year in Coihaique is February, with an average high of 63°F and low of 47°F.

The cold season lasts for 2.9 months, from May 23 to August 20, with an average daily high temperature below 46°F. The coldest month of the year in Coihaique is July, with an average low of 31°F and high of 42°F.

Average High and Low Temperature in Coihaique

Average High and Low Temperature in CoihaiquewarmwarmcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJul 1641°FJul 1641°FFeb 1764°FFeb 1764°F30°F30°F47°F47°FDec 859°FDec 859°FMay 2346°FMay 2346°FAug 2046°FAug 2046°F44°F44°F43°F43°F34°F34°F33°F33°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 63°F63°F60°F53°F47°F42°F42°F45°F50°F54°F57°F60°F
Temp. 55°F55°F51°F46°F41°F37°F36°F38°F42°F46°F49°F52°F
Low 47°F47°F43°F39°F35°F32°F31°F33°F36°F39°F42°F45°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 Coihaique

Average Hourly Temperature in CoihaiqueJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldcoldcoldcoolcool
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.

Evanton, United Kingdom (8,126 miles away) is the far-away foreign place with temperatures most similar to Coihaique (view comparison).

Map
Marker
© OpenStreetMap contributors

Compare Coihaique to another city:

Map

In Coihaique, 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 Coihaique begins around August 25 and lasts for 7.1 months, ending around March 29.

The clearest month of the year in Coihaique is February, during which on average the sky is clear, mostly clear, or partly cloudy 45% of the time.

The cloudier part of the year begins around March 29 and lasts for 4.9 months, ending around August 25.

The cloudiest month of the year in Coihaique is May, during which on average the sky is overcast or mostly cloudy 75% of the time.

Cloud Cover Categories in Coihaique

Cloud Cover Categories in CoihaiqueclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Feb 946%Feb 946%May 2023%May 2023%Aug 2535%Aug 2535%Mar 2935%Mar 2935%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 55%55%61%69%75%73%70%66%61%59%57%57%
Clearer 45%45%39%31%25%27%30%34%39%41%43%43%

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

The wetter season lasts 4.4 months, from April 14 to August 26, with a greater than 30% chance of a given day being a wet day. The month with the most wet days in Coihaique is May, with an average of 11.1 days with at least 0.04 inches of precipitation.

The drier season lasts 7.6 months, from August 26 to April 14. The month with the fewest wet days in Coihaique is January, 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 Coihaique is May, with an average of 10.5 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 35% on May 21.

Daily Chance of Precipitation in Coihaique

Daily Chance of Precipitation in CoihaiquewetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%May 2639%May 2639%Jan 1020%Jan 1020%Apr 1430%Apr 1430%Aug 2630%Aug 2630%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 6.7d6.3d7.8d8.8d10.5d9.3d8.6d8.8d6.7d7.8d7.5d7.2d
Mixed 0.0d0.0d0.0d0.1d0.5d1.3d0.9d0.5d0.2d0.1d0.1d0.0d
Snow 0.0d0.0d0.0d0.0d0.2d0.2d0.2d0.1d0.1d0.0d0.0d0.0d
Any 6.7d6.3d7.8d8.9d11.1d10.8d9.8d9.5d6.9d7.9d7.6d7.2d

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. Coihaique experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Coihaique. The month with the most rain in Coihaique is May, with an average rainfall of 3.2 inches.

The month with the least rain in Coihaique is January, with an average rainfall of 1.5 inches.

Average Monthly Rainfall in Coihaique

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 1.5″1.5″1.9″2.3″3.2″3.2″2.6″2.6″1.7″1.9″1.8″1.7″

Snowfall

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

The snowy period of the year lasts for 1.7 months, from May 23 to July 15, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Coihaique is June, with an average snowfall of 1.4 inches.

The snowless period of the year lasts for 10 months, from July 15 to May 23. The least snow falls around December 22, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Coihaique

Average Monthly Snowfall in CoihaiquesnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 inJun 231.4 inJun 231.4 inDec 220.0 inDec 220.0 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 0.0″0.0″0.0″0.1″0.8″1.4″1.0″0.4″0.2″0.0″0.0″0.0″

The length of the day in Coihaique varies significantly over the course of the year. In 2024, the shortest day is June 20, with 8 hours, 42 minutes of daylight; the longest day is December 21, with 15 hours, 42 minutes of daylight.

Hours of Daylight and Twilight in Coihaique

Hours of Daylight and Twilight in CoihaiqueJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minSep 2212 hr, 7 minSep 2215 hr, 42 minDec 2115 hr, 42 minDec 2112 hr, 11 minMar 2012 hr, 11 minMar 208 hr, 42 minJun 208 hr, 42 minJun 20daydaynightNowNow
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 15.2h13.9h12.3h10.7h9.4h8.8h9.1h10.3h11.8h13.4h14.9h15.6h

The earliest sunrise is at 5:52 AM on December 10, and the latest sunrise is 2 hours, 37 minutes later at 8:29 AM on June 26. The earliest sunset is at 5:10 PM on June 14, and the latest sunset is 4 hours, 30 minutes later at 9:40 PM on January 1.

Daylight saving time (DST) is observed in Coihaique during 2024, starting in the spring on September 8 and ending in the fall on April 6.

Sunrise & Sunset with Twilight and Daylight Saving Time in Coihaique

Sunrise & Sunset with Twilight and Daylight Saving Time in CoihaiqueJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM2 AMDec 105:52 AMDec 105:52 AM9:40 PMJan 19:40 PMJan 1Jun 145:10 PMJun 145:10 PM8:29 AMJun 268:29 AMJun 26DSTApr 6DSTApr 6Sep 8DSTSep 8DSTdaynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 Coihaique

Solar Elevation and Azimuth in CoihaiqueJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM00001010102020203030304040506000010101010202020303040405050602168NowNow
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 Coihaique

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.

The perceived humidity level in Coihaique, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

Humidity Comfort Levels in Coihaique

Humidity Comfort Levels in CoihaiqueJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 160%Jul 160%Dec 210%Dec 210%NowNowdrydrycomfortablecomfortable
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Coihaique experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 3.9 months, from October 13 to February 9, with average wind speeds of more than 7.5 miles per hour. The windiest month of the year in Coihaique is December, with an average hourly wind speed of 8.4 miles per hour.

The calmer time of year lasts for 8.1 months, from February 9 to October 13. The calmest month of the year in Coihaique is May, with an average hourly wind speed of 6.6 miles per hour.

Average Wind Speed in Coihaique

Average Wind Speed in CoihaiquewindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphDec 298.5 mphDec 298.5 mphJun 36.5 mphJun 36.5 mphOct 137.5 mphOct 137.5 mphFeb 97.5 mphFeb 97.5 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) 8.17.37.06.86.66.87.07.17.07.58.18.4

The predominant average hourly wind direction in Coihaique is from the west throughout the year.

Wind Direction in Coihaique

Wind Direction in CoihaiqueJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwesteastnorth
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).

Coihaique is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.9 months, from December 25 to March 22, with an average temperature above 55°F. The month of the year in Coihaique with the warmest water is February, with an average temperature of 57°F.

The time of year with cooler water lasts for 3.8 months, from June 11 to October 4, with an average temperature below 49°F. The month of the year in Coihaique with the coolest water is August, with an average temperature of 48°F.

Average Water Temperature in Coihaique

Average Water Temperature in CoihaiquewarmcoolJanFebMarAprMayJunJulAugSepOctNovDec44°F44°F46°F46°F48°F48°F50°F50°F52°F52°F54°F54°F56°F56°F58°F58°F60°F60°FFeb 257°FFeb 257°F48°FAug 1248°FAug 12Dec 2555°FDec 2555°FMar 2255°FMar 2255°FJun 1149°FJun 1149°FOct 449°FOct 449°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 56°F57°F55°F53°F51°F49°F48°F48°F48°F50°F52°F54°F

To characterize how pleasant the weather is in Coihaique 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 time of year to visit Coihaique for general outdoor tourist activities is from late December to late February, with a peak score in the last week of January.

Tourism Score in Coihaique

Tourism Score in Coihaiquebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810103.73.70.00.0NowNowtemperaturetemperature 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 Coihaique for hot-weather activities is from late January to late February, with a peak score in the third week of February.

Beach/Pool Score in Coihaique

Beach/Pool Score in CoihaiqueJanFebMarAprMayJunJulAugSepOctNovDec002244668810100.70.70.00.0NowNow cloudscloudsprecipitationprecipitation
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 Coihaique typically lasts for 4.3 months (130 days), from around November 2 to around March 12, rarely starting before September 24 or after December 12, and rarely ending before January 15 or after April 20.

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

Time Spent in Various Temperature Bands and the Growing Season in CoihaiqueJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Nov 250%Nov 250%Mar 1250%Mar 1250%Dec 1290%Dec 1290%Jan 1590%Jan 1590%Sep 2410%Sep 2410%Apr 2010%Apr 2010%0%Jul 160%Jul 16NowNowfreezingvery coldcoldcool
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 Coihaique should appear around November 15, only rarely appearing before November 1 or after November 30.

Growing Degree Days in Coihaique

Growing Degree Days in CoihaiqueJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F200°F200°F400°F400°F600°F600°F800°F800°F1,000°F1,000°FNov 1590°FNov 1590°FJun 30761°FJun 30761°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.5 months, from November 2 to February 16, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest month of the year in Coihaique is December, with an average of 7.0 kWh.

The darker period of the year lasts for 4.0 months, from April 20 to August 22, with an average daily incident shortwave energy per square meter below 2.2 kWh. The darkest month of the year in Coihaique is June, with an average of 1.0 kWh.

Average Daily Incident Shortwave Solar Energy in Coihaique

Average Daily Incident Shortwave Solar Energy in CoihaiquebrightbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhDec 217.1 kWhDec 217.1 kWhJun 161.0 kWhJun 161.0 kWhNov 25.9 kWhNov 25.9 kWhFeb 165.9 kWhFeb 165.9 kWhApr 202.2 kWhApr 202.2 kWhAug 222.2 kWhAug 222.2 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) 6.85.84.12.51.41.01.22.03.45.06.47.0

For the purposes of this report, the geographical coordinates of Coihaique are -45.575 deg latitude, -72.066 deg longitude, and 981 ft elevation.

The topography within 2 miles of Coihaique contains large variations in elevation, with a maximum elevation change of 2,221 feet and an average elevation above sea level of 1,136 feet. Within 10 miles contains large variations in elevation (4,921 feet). Within 50 miles also contains extreme variations in elevation (8,488 feet).

The area within 2 miles of Coihaique is covered by trees (44%), shrubs (40%), and grassland (13%), within 10 miles by trees (67%) and shrubs (15%), and within 50 miles by trees (44%) and shrubs (31%).

This report illustrates the typical weather in Coihaique, 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 is only a single weather station, Balmaceda Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Coihaique.

At a distance of 48 kilometers from Coihaique, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the station and Coihaique according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

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.