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Climate and Average Weather Year Round at Ernesto Cortissoz International Airport Colombia

At Ernesto Cortissoz International Airport, the wet season is overcast, the dry season is windy and partly cloudy, and it is hot and oppressive year round. Over the course of the year, the temperature typically varies from 76°F to 90°F and is rarely below 73°F or above 94°F.

Based on the beach/pool score, the best time of year to visit Ernesto Cortissoz International Airport for hot-weather activities is from late December to mid March.

Climate at Ernesto Cortissoz International Airport

hotJanFebMarAprMayJunJulAugSepOctNovDecNowNow52%52%5%5%overcastclearprecipitation: 4.6 inprecipitation: 4.6 in0.0 in0.0 inmuggy: 100%muggy: 100%100%100%beach/pool score: 6.9beach/pool score: 6.93.63.6
Ernesto Cortissoz International Airport weather by month. Click on each chart for more information.

The temperature at Ernesto Cortissoz International Airport varies so little throughout the year that it is not entirely meaningful to discuss hot and cold seasons.

Average High and Low Temperature at Ernesto Cortissoz International Airport

Average High and Low Temperature at Ernesto Cortissoz International AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FJan 2287°FJan 2287°FMay 490°FMay 490°F76°F76°F78°F78°FApr 690°FApr 690°FJul 590°FJul 590°FDec 1388°FDec 1388°FFeb 2788°FFeb 2788°F77°F77°F78°F78°F77°F77°F76°F76°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 87°F88°F89°F90°F90°F90°F90°F90°F90°F89°F88°F88°F
Temp. 81°F81°F81°F82°F83°F83°F83°F83°F82°F81°F81°F81°F
Low 76°F76°F77°F78°F78°F78°F78°F77°F77°F76°F77°F77°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 at Ernesto Cortissoz International Airport

Average Hourly Temperature at Ernesto Cortissoz International AirportJanFebMarAprMayJunJulAugSepOctNovDec12 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 AMNowNowwarmwarmhot
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.

Davao, Philippines (10,576 miles away) is the far-away foreign place with temperatures most similar to Ernesto Cortissoz International Airport (view comparison).

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At Ernesto Cortissoz International Airport, 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 at Ernesto Cortissoz International Airport begins around December 9 and lasts for 3.9 months, ending around April 4.

The clearest month of the year at Ernesto Cortissoz International Airport is January, during which on average the sky is clear, mostly clear, or partly cloudy 51% of the time.

The cloudier part of the year begins around April 4 and lasts for 8.1 months, ending around December 9.

The cloudiest month of the year at Ernesto Cortissoz International Airport is September, during which on average the sky is overcast or mostly cloudy 95% of the time.

Cloud Cover Categories at Ernesto Cortissoz International Airport

Cloud Cover Categories at Ernesto Cortissoz International AirportclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jan 1352%Jan 1352%Sep 235%Sep 235%Dec 928%Dec 928%Apr 429%Apr 429%NowNowclearmostly cloudyovercastmostly clearpartly cloudy
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 49%53%61%80%93%93%90%92%95%92%83%65%
Clearer 51%47%39%20%7%7%10%8%5%8%17%35%

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Ernesto Cortissoz International Airport varies significantly throughout the year.

The wetter season lasts 6.3 months, from May 9 to November 18, with a greater than 24% chance of a given day being a wet day. The month with the most wet days at Ernesto Cortissoz International Airport is October, with an average of 13.8 days with at least 0.04 inches of precipitation.

The drier season lasts 5.7 months, from November 18 to May 9. The month with the fewest wet days at Ernesto Cortissoz International Airport is February, with an average of 0.3 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 at Ernesto Cortissoz International Airport is October, with an average of 13.8 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 48% on October 15.

Daily Chance of Precipitation at Ernesto Cortissoz International Airport

Daily Chance of Precipitation at Ernesto Cortissoz International AirportwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Oct 1548%Oct 1548%Jan 181%Jan 181%May 924%May 924%Nov 1824%Nov 1824%NowNowrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 0.3d0.3d0.5d3.0d8.1d8.0d7.3d9.7d12.0d13.8d8.1d2.6d

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. Ernesto Cortissoz International Airport experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 8.4 months, from April 9 to December 21, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain at Ernesto Cortissoz International Airport is October, with an average rainfall of 4.6 inches.

The rainless period of the year lasts for 3.6 months, from December 21 to April 9. The month with the least rain at Ernesto Cortissoz International Airport is February, with an average rainfall of 0.0 inches.

Average Monthly Rainfall at Ernesto Cortissoz International Airport

Average Monthly Rainfall at Ernesto Cortissoz International AirportrainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 inOct 144.6 inOct 144.6 inJan 260.0 inJan 260.0 inMay 252.6 inMay 252.6 inApr 90.5 inApr 90.5 inDec 210.5 inDec 210.5 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.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 0.0″0.0″0.1″0.7″2.3″2.2″2.0″2.5″3.6″4.6″2.9″0.7″

The length of the day at Ernesto Cortissoz International Airport does not vary substantially over the course of the year, staying within 45 minutes of 12 hours throughout. In 2024, the shortest day is December 21, with 11 hours, 29 minutes of daylight; the longest day is June 20, with 12 hours, 46 minutes of daylight.

Hours of Daylight and Twilight at Ernesto Cortissoz International Airport

Hours of Daylight and Twilight at Ernesto Cortissoz International AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 1912 hr, 6 minMar 1912 hr, 46 minJun 2012 hr, 46 minJun 2012 hr, 7 minSep 2212 hr, 7 minSep 2211 hr, 29 minDec 2111 hr, 29 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 11.6h11.8h12.1h12.4h12.6h12.8h12.7h12.5h12.2h11.9h11.6h11.5h

The earliest sunrise is at 5:35 AM on May 29, and the latest sunrise is 48 minutes later at 6:22 AM on January 26. The earliest sunset is at 5:32 PM on November 16, and the latest sunset is 54 minutes later at 6:26 PM on July 12.

Daylight saving time (DST) is not observed at Ernesto Cortissoz International Airport during 2024.

Sunrise & Sunset with Twilight at Ernesto Cortissoz International Airport

Sunrise & Sunset with Twilight at Ernesto Cortissoz International AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMMay 295:35 AMMay 295:35 AM6:26 PMJul 126:26 PMJul 12Nov 165:32 PMNov 165:32 PM6:22 AMJan 266:22 AMJan 26daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 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 at Ernesto Cortissoz International Airport

Solar Elevation and Azimuth at Ernesto Cortissoz International AirportJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM00001010101020202020303030304040404050505050606060607070800000101010102020202030303030404040405050505060606070708056NowNow
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 at Ernesto Cortissoz International Airport

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 at Ernesto Cortissoz International Airport, 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 100% throughout.

Humidity Comfort Levels at Ernesto Cortissoz International Airport

Humidity Comfort Levels at Ernesto Cortissoz International AirportJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 7100%Feb 7100%100%Aug 8100%Aug 8NowNowmiserablemiserableoppressiveoppressivemuggymuggy
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 31.0d29.0d31.0d30.0d31.0d30.0d31.0d31.0d30.0d31.0d30.0d31.0d

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 at Ernesto Cortissoz International Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.1 months, from November 30 to May 1, with average wind speeds of more than 9.6 miles per hour. The windiest month of the year at Ernesto Cortissoz International Airport is February, with an average hourly wind speed of 13.1 miles per hour.

The calmer time of year lasts for 7.0 months, from May 1 to November 30. The calmest month of the year at Ernesto Cortissoz International Airport is October, with an average hourly wind speed of 6.3 miles per hour.

Average Wind Speed at Ernesto Cortissoz International Airport

Average Wind Speed at Ernesto Cortissoz International AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphFeb 2613.3 mphFeb 2613.3 mphOct 46.0 mphOct 46.0 mphNov 309.6 mphNov 309.6 mphMay 19.6 mphMay 19.6 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) 12.413.112.911.28.17.68.37.46.46.38.310.9

The predominant average hourly wind direction at Ernesto Cortissoz International Airport varies throughout the year.

The wind is most often from the east for 1.3 months, from June 15 to July 24, with a peak percentage of 53% on July 10. The wind is most often from the north for 11 months, from July 24 to June 15, with a peak percentage of 54% on January 1.

Wind Direction at Ernesto Cortissoz International Airport

Wind Direction at Ernesto Cortissoz International AirportNENJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNoweastnorthwestsouth
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).

Ernesto Cortissoz International 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 water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.2 months, from August 9 to November 17, with an average temperature above 83°F. The month of the year at Ernesto Cortissoz International Airport with the warmest water is September, with an average temperature of 84°F.

The time of year with cooler water lasts for 3.4 months, from January 2 to April 14, with an average temperature below 80°F. The month of the year at Ernesto Cortissoz International Airport with the coolest water is February, with an average temperature of 79°F.

Average Water Temperature at Ernesto Cortissoz International Airport

Average Water Temperature at Ernesto Cortissoz International AirportwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec76°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°FSep 2384°FSep 2384°F79°FFeb 979°FFeb 9Aug 983°FAug 983°FNov 1783°FNov 1783°FJan 280°FJan 280°FApr 1480°FApr 1480°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 79°F79°F79°F80°F82°F83°F83°F83°F84°F84°F83°F81°F

To characterize how pleasant the weather is at Ernesto Cortissoz International Airport 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 Ernesto Cortissoz International Airport for general outdoor tourist activities is from late December to mid March, with a peak score in the third week of January.

Tourism Score at Ernesto Cortissoz International Airport

Tourism Score at Ernesto Cortissoz International Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810104.84.82.52.5NowNowtemperaturetemperaturecloudscloudsprecipitationprecipitationtourism 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 Ernesto Cortissoz International Airport for hot-weather activities is from late December to mid March, with a peak score in the third week of January.

Beach/Pool Score at Ernesto Cortissoz International Airport

Beach/Pool Score at Ernesto Cortissoz International Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.96.93.63.64.34.33.73.7NowNowtemperaturetemperature 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).

Temperatures at Ernesto Cortissoz International Airport are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Time Spent in Various Temperature Bands and the Growing Season at Ernesto Cortissoz International Airport

Time Spent in Various Temperature Bands and the Growing Season at Ernesto Cortissoz International AirportJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Jan 1100%Jan 1100%Jul 2100%Jul 2NowNowwarmhotcomfortable
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.

Growing Degree Days at Ernesto Cortissoz International Airport

Growing Degree Days at Ernesto Cortissoz International AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°FJan 490°FJan 490°FJan 31900°FJan 31900°FDec 3111,405°FDec 3111,405°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 3.0 months, from January 12 to April 11, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest month of the year at Ernesto Cortissoz International Airport is March, with an average of 6.3 kWh.

The darker period of the year lasts for 2.8 months, from August 18 to November 12, with an average daily incident shortwave energy per square meter below 3.9 kWh. The darkest month of the year at Ernesto Cortissoz International Airport is October, with an average of 3.4 kWh.

Average Daily Incident Shortwave Solar Energy at Ernesto Cortissoz International Airport

Average Daily Incident Shortwave Solar Energy at Ernesto Cortissoz International AirportbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhMar 176.4 kWhMar 176.4 kWhOct 53.2 kWhOct 53.2 kWhJan 125.8 kWhJan 125.8 kWhAug 183.9 kWhAug 183.9 kWhNov 123.9 kWhNov 123.9 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) 5.86.26.35.54.23.94.23.93.43.44.04.9

For the purposes of this report, the geographical coordinates of Ernesto Cortissoz International Airport are 10.890 deg latitude, -74.781 deg longitude, and 79 ft elevation.

The topography within 2 miles of Ernesto Cortissoz International Airport contains only modest variations in elevation, with a maximum elevation change of 197 feet and an average elevation above sea level of 80 feet. Within 10 miles contains only modest variations in elevation (715 feet). Within 50 miles contains significant variations in elevation (6,115 feet).

The area within 2 miles of Ernesto Cortissoz International Airport is covered by grassland (56%), trees (16%), water (13%), and shrubs (11%), within 10 miles by grassland (50%) and trees (16%), and within 50 miles by water (54%) and grassland (19%).

This report illustrates the typical weather at Ernesto Cortissoz International 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

Ernesto Cortissoz International 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.

In this case, the only station close and reliable enough to use as a fallback is Aeropuerto Internacional de Crespo.

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.