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Climate and Average Weather Year Round in Ciudad Obregón Mexico

In Ciudad Obregón, the summers are long, sweltering, and muggy; the winters are cool and dry; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 49°F to 99°F and is rarely below 42°F or above 104°F.

Based on the beach/pool score, the best times of year to visit Ciudad Obregón for hot-weather activities are from mid May to late June and from early to mid October.

Climate in Ciudad Obregón

warmhotswelteringhotwarmJanFebMarAprMayJunJulAugSepOctNovDecNowNow85%85%34%34%clearovercastprecipitation: 3.5 inprecipitation: 3.5 in0.1 in0.1 inmuggy: 98%muggy: 98%0%0%drydrybeach/pool score: 7.6beach/pool score: 7.61.91.9
Ciudad Obregón weather by month. Click on each chart for more information.

The hot season lasts for 4.9 months, from May 17 to October 13, with an average daily high temperature above 94°F. The hottest month of the year in Ciudad Obregón is July, with an average high of 98°F and low of 80°F.

The cool season lasts for 3.3 months, from November 28 to March 7, with an average daily high temperature below 81°F. The coldest month of the year in Ciudad Obregón is January, with an average low of 50°F and high of 77°F.

Average High and Low Temperature in Ciudad Obregón

Average High and Low Temperature in Ciudad ObregónhotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FJan 777°FJan 777°FJun 3099°FJun 3099°F49°F49°F79°F79°FMay 1794°FMay 1794°FOct 1394°FOct 1394°FNov 2881°FNov 2881°FMar 781°FMar 781°F67°F67°F70°F70°F54°F54°F54°F54°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 77°F79°F82°F88°F94°F98°F98°F98°F97°F94°F85°F78°F
Temp. 63°F65°F68°F74°F80°F87°F88°F88°F86°F81°F71°F63°F
Low 50°F52°F55°F60°F67°F76°F80°F79°F77°F68°F58°F51°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 Ciudad Obregón

Average Hourly Temperature in Ciudad ObregónJanFebMarAprMayJunJulAugSepOctNovDec12 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 AMNowNowcoldcoldcoolcoolcoolcoolcomfortablecomfortablewarmhotswelteringcomfortablehotcomfortable
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.

Nuwaybi‘a, Egypt (7,891 miles away) and Tabālah, Saudi Arabia (8,683 miles) are the far-away foreign places with temperatures most similar to Ciudad Obregón (view comparison).

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In Ciudad Obregón, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in Ciudad Obregón begins around September 12 and lasts for 9.8 months, ending around July 4.

The clearest month of the year in Ciudad Obregón is June, during which on average the sky is clear, mostly clear, or partly cloudy 79% of the time.

The cloudier part of the year begins around July 4 and lasts for 2.2 months, ending around September 12.

The cloudiest month of the year in Ciudad Obregón is August, during which on average the sky is overcast or mostly cloudy 61% of the time.

Cloud Cover Categories in Ciudad Obregón

Cloud Cover Categories in Ciudad ObregónclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jun 785%Jun 785%Aug 334%Aug 334%Sep 1259%Sep 1259%Jul 461%Jul 461%NowNowclearovercastmostly cloudymostly 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 36%37%34%33%23%21%55%61%36%23%32%36%
Clearer 64%63%66%67%77%79%45%39%64%77%68%64%

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

The wetter season lasts 2.7 months, from June 26 to September 17, with a greater than 23% chance of a given day being a wet day. The month with the most wet days in Ciudad Obregón is August, with an average of 13.4 days with at least 0.04 inches of precipitation.

The drier season lasts 9.3 months, from September 17 to June 26. The month with the fewest wet days in Ciudad Obregón is April, with an average of 0.5 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 Ciudad Obregón is August, with an average of 13.4 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 45% on August 6.

Daily Chance of Precipitation in Ciudad Obregón

Daily Chance of Precipitation in Ciudad ObregónwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Aug 645%Aug 645%Apr 21%Apr 21%Jun 2623%Jun 2623%Sep 1723%Sep 1723%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).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 2.2d1.9d0.7d0.5d0.6d3.7d12.5d13.4d7.5d2.6d1.7d2.2d

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. Ciudad Obregón experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 8.2 months, from June 11 to February 16, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Ciudad Obregón is August, with an average rainfall of 3.5 inches.

The rainless period of the year lasts for 3.8 months, from February 16 to June 11. The month with the least rain in Ciudad Obregón is May, with an average rainfall of 0.1 inches.

Average Monthly Rainfall in Ciudad Obregón

Average Monthly Rainfall in Ciudad ObregónrainrainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inJul 283.5 inJul 283.5 inMay 60.1 inMay 60.1 inJan 40.8 inJan 40.8 inNov 80.5 inNov 80.5 inJun 110.5 inJun 110.5 inFeb 160.5 inFeb 160.5 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 0.7″0.5″0.2″0.1″0.1″0.7″3.2″3.5″2.5″0.9″0.5″0.7″

The length of the day in Ciudad Obregón varies over the course of the year. In 2024, the shortest day is December 21, with 10 hours, 24 minutes of daylight; the longest day is June 20, with 13 hours, 53 minutes of daylight.

Hours of Daylight and Twilight in Ciudad Obregón

Hours of Daylight and Twilight in Ciudad ObregónJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 1912 hr, 7 minMar 1913 hr, 53 minJun 2013 hr, 53 minJun 2012 hr, 9 minSep 2212 hr, 9 minSep 2210 hr, 24 minDec 2110 hr, 24 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 10.6h11.2h12.0h12.8h13.5h13.9h13.7h13.1h12.3h11.5h10.8h10.4h

The earliest sunrise is at 5:23 AM on June 9, and the latest sunrise is 1 hour, 48 minutes later at 7:11 AM on January 12. The earliest sunset is at 5:24 PM on November 30, and the latest sunset is 1 hour, 54 minutes later at 7:19 PM on July 1.

Daylight saving time (DST) is not observed in Ciudad Obregón during 2024.

Sunrise & Sunset with Twilight in Ciudad Obregón

Sunrise & Sunset with Twilight in Ciudad ObregónJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 95:23 AMJun 95:23 AM7:19 PMJul 17:19 PMJul 1Nov 305:24 PMNov 305:24 PM7:11 AMJan 127:11 AMJan 12daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 in Ciudad Obregón

Solar Elevation and Azimuth in Ciudad ObregónJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM000010101010202020203030303040404040505050606070708000001010101020202020303030304040404050505060606070708039NowNow
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 Ciudad Obregón

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.

Ciudad Obregón experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.4 months, from June 6 to October 19, during which time the comfort level is muggy, oppressive, or miserable at least 25% of the time. The month with the most muggy days in Ciudad Obregón is August, with 30.1 days that are muggy or worse.

The month with the fewest muggy days in Ciudad Obregón is March, with 0.1 days that are muggy or worse.

Humidity Comfort Levels in Ciudad Obregón

Humidity Comfort Levels in Ciudad ObregónmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 250%Jan 250%98%Aug 1698%Aug 16Jun 625%Jun 625%Oct 1925%Oct 1925%NowNowmiserablemiserableoppressiveoppressivedrydryhumidhumid
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 0.2d0.2d0.1d0.2d2.1d12.9d27.4d30.1d25.4d10.1d1.5d0.3d

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 Ciudad Obregón experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.2 months, from February 6 to July 13, with average wind speeds of more than 7.1 miles per hour. The windiest month of the year in Ciudad Obregón is June, with an average hourly wind speed of 8.4 miles per hour.

The calmer time of year lasts for 6.8 months, from July 13 to February 6. The calmest month of the year in Ciudad Obregón is August, with an average hourly wind speed of 5.8 miles per hour.

Average Wind Speed in Ciudad Obregón

Average Wind Speed in Ciudad ObregónwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphJun 148.5 mphJun 148.5 mphAug 165.7 mphAug 165.7 mphFeb 67.1 mphFeb 67.1 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) 6.97.37.78.18.28.47.05.86.26.76.86.9

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

The wind is most often from the west for 4.7 months, from January 23 to June 15 and for 2.1 months, from September 19 to November 23, with a peak percentage of 48% on April 17. The wind is most often from the south for 3.1 months, from June 15 to September 19, with a peak percentage of 49% on July 4. The wind is most often from the north for 2.0 months, from November 23 to January 23, with a peak percentage of 37% on January 1.

Wind Direction in Ciudad Obregón

Wind Direction in Ciudad ObregónNWSWNJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsouthnortheast
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).

Ciudad Obregón 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 significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.7 months, from June 27 to October 18, with an average temperature above 82°F. The month of the year in Ciudad Obregón with the warmest water is August, with an average temperature of 86°F.

The time of year with cooler water lasts for 4.0 months, from December 13 to April 12, with an average temperature below 70°F. The month of the year in Ciudad Obregón with the coolest water is February, with an average temperature of 65°F.

Average Water Temperature in Ciudad Obregón

Average Water Temperature in Ciudad ObregónwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°FAug 2286°FAug 2286°F65°FFeb 1265°FFeb 12Jun 2782°FJun 2782°FOct 1882°FOct 1882°FDec 1370°FDec 1370°FApr 1270°FApr 1270°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 66°F65°F67°F70°F75°F80°F84°F86°F86°F82°F76°F69°F

To characterize how pleasant the weather is in Ciudad Obregón 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 Ciudad Obregón for general outdoor tourist activities are from early March to early June and from early October to late November, with a peak score in the first week of November.

Tourism Score in Ciudad Obregón

Tourism Score in Ciudad Obregónbest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.17.12.92.97.17.15.15.1NowNow 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 times of year to visit Ciudad Obregón for hot-weather activities are from mid May to late June and from early to mid October, with a peak score in the first week of June.

Beach/Pool Score in Ciudad Obregón

Beach/Pool Score in Ciudad ObregónJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.67.61.91.96.96.94.54.5NowNowtemperaturetemperature 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 in Ciudad Obregón 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 in Ciudad Obregón

Time Spent in Various Temperature Bands and the Growing Season in Ciudad ObregónJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Feb 19100%Feb 1997%Jan 1897%Jan 18Jul 19100%Jul 19100%NowNowcoldcoolcomfortablewarmhotsweltering
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 in Ciudad Obregón

Growing Degree Days in Ciudad ObregónJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°F6,000°F6,000°F7,000°F7,000°F8,000°F8,000°F9,000°F9,000°FJan 890°FJan 890°FMar 5900°FMar 5900°FApr 191,800°FApr 191,800°FDec 318,993°FDec 318,993°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 2.4 months, from April 15 to June 27, with an average daily incident shortwave energy per square meter above 7.3 kWh. The brightest month of the year in Ciudad Obregón is May, with an average of 8.0 kWh.

The darker period of the year lasts for 3.0 months, from November 6 to February 5, with an average daily incident shortwave energy per square meter below 4.7 kWh. The darkest month of the year in Ciudad Obregón is December, with an average of 3.9 kWh.

Average Daily Incident Shortwave Solar Energy in Ciudad Obregón

Average Daily Incident Shortwave Solar Energy in Ciudad ObregónbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 18.2 kWhJun 18.2 kWhDec 173.8 kWhDec 173.8 kWhApr 157.3 kWhApr 157.3 kWhNov 64.7 kWhNov 64.7 kWhFeb 54.7 kWhFeb 54.7 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) 4.15.16.37.38.07.86.15.45.75.44.43.9

For the purposes of this report, the geographical coordinates of Ciudad Obregón are 27.486 deg latitude, -109.941 deg longitude, and 125 ft elevation.

The topography within 2 miles of Ciudad Obregón is essentially flat, with a maximum elevation change of 79 feet and an average elevation above sea level of 127 feet. Within 10 miles is essentially flat (1,946 feet). Within 50 miles contains very significant variations in elevation (3,885 feet).

The area within 2 miles of Ciudad Obregón is covered by shrubs (60%) and artificial surfaces (34%), within 10 miles by cropland (72%) and trees (21%), and within 50 miles by trees (41%) and cropland (22%).

This report illustrates the typical weather in Ciudad Obregón, 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, Ciudad Obregón International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Ciudad Obregón.

At a distance of 15 kilometers from Ciudad Obregón, 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 Ciudad Obregón 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.