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Climate and Average Weather Year Round in Zaratamo Spain

In Zaratamo, the summers are comfortable; the winters are long, cold, wet, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 40°F to 76°F and is rarely below 32°F or above 85°F.

Based on the tourism score, the best time of year to visit Zaratamo for warm-weather activities is from late June to early September.

Climate in Zaratamo

coldcoolcomfortablewarmcomfortablecoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow77%77%36%36%overcastclearprecipitation: 3.6 inprecipitation: 3.6 in0.8 in0.8 inmuggy: 11%muggy: 11%0%0%drydrytourism score: 8.1tourism score: 8.11.11.1
Zaratamo weather by month. Click on each chart for more information.

The warm season lasts for 3.0 months, from June 20 to September 22, with an average daily high temperature above 71°F. The hottest month of the year in Zaratamo is August, with an average high of 76°F and low of 60°F.

The cool season lasts for 3.8 months, from November 19 to March 12, with an average daily high temperature below 57°F. The coldest month of the year in Zaratamo is January, with an average low of 41°F and high of 52°F.

Average High and Low Temperature in Zaratamo

Average High and Low Temperature in ZaratamowarmcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FFeb 753°FFeb 753°FAug 776°FAug 776°F40°F40°F61°F61°FJun 2071°FJun 2071°FSep 2271°FSep 2271°FNov 1957°FNov 1957°FMar 1257°FMar 1257°F57°F57°F56°F56°F46°F46°F43°F43°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 52°F54°F57°F60°F65°F71°F75°F76°F72°F66°F58°F53°F
Temp. 46°F47°F50°F53°F58°F63°F67°F68°F65°F59°F52°F48°F
Low 41°F41°F43°F46°F51°F56°F59°F60°F57°F52°F46°F42°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 Zaratamo

Average Hourly Temperature in ZaratamoJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldcoldcoldcoolcomfortablecomfortablewarmvery cold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Mar del Plata, Argentina (6,581 miles away) is the far-away foreign place with temperatures most similar to Zaratamo (view comparison).

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In Zaratamo, 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 Zaratamo begins around June 12 and lasts for 3.2 months, ending around September 18.

The clearest month of the year in Zaratamo is July, during which on average the sky is clear, mostly clear, or partly cloudy 75% of the time.

The cloudier part of the year begins around September 18 and lasts for 8.8 months, ending around June 12.

The cloudiest month of the year in Zaratamo is January, during which on average the sky is overcast or mostly cloudy 63% of the time.

Cloud Cover Categories in Zaratamo

Cloud Cover Categories in ZaratamoclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2377%Jul 2377%Jan 1636%Jan 1636%Jun 1256%Jun 1256%Sep 1857%Sep 1857%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 63%58%56%54%52%41%25%30%42%54%62%62%
Clearer 37%42%44%46%48%59%75%70%58%46%38%38%

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

The wetter season lasts 7.8 months, from September 22 to May 17, with a greater than 25% chance of a given day being a wet day. The month with the most wet days in Zaratamo is November, with an average of 10.7 days with at least 0.04 inches of precipitation.

The drier season lasts 4.2 months, from May 17 to September 22. The month with the fewest wet days in Zaratamo is July, with an average of 4.2 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 Zaratamo is November, with an average of 10.7 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 38% on November 17.

Daily Chance of Precipitation in Zaratamo

Daily Chance of Precipitation in ZaratamowetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Nov 1738%Nov 1738%Aug 212%Aug 212%Sep 2225%Sep 2225%May 1725%May 1725%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 10.3d8.8d8.4d9.4d7.9d5.5d4.2d4.4d6.8d9.1d10.7d10.3d
Mixed 0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d
Any 10.5d8.9d8.4d9.4d7.9d5.5d4.2d4.4d6.8d9.1d10.7d10.3d

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. Zaratamo experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Zaratamo. The month with the most rain in Zaratamo is November, with an average rainfall of 3.6 inches.

The month with the least rain in Zaratamo is July, with an average rainfall of 0.9 inches.

Average Monthly Rainfall in Zaratamo

Average Monthly Rainfall in ZaratamoJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inNov 193.6 inNov 193.6 inJul 230.8 inJul 230.8 inJan 162.9 inJan 162.9 inApr 92.5 inApr 92.5 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 2.9″2.6″2.2″2.4″1.9″1.5″0.9″1.0″1.8″2.8″3.6″2.9″

The length of the day in Zaratamo varies significantly over the course of the year. In 2024, the shortest day is December 21, with 8 hours, 59 minutes of daylight; the longest day is June 20, with 15 hours, 23 minutes of daylight.

Hours of Daylight and Twilight in Zaratamo

Hours of Daylight and Twilight in ZaratamoJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2015 hr, 23 minJun 2015 hr, 23 minJun 2012 hr, 9 minSep 2212 hr, 9 minSep 228 hr, 59 minDec 218 hr, 59 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 9.4h10.5h12.0h13.4h14.7h15.3h15.0h13.9h12.5h11.0h9.7h9.0h

The earliest sunrise is at 6:30 AM on June 14, and the latest sunrise is 2 hours, 13 minutes later at 8:43 AM on January 4. The earliest sunset is at 5:35 PM on December 8, and the latest sunset is 4 hours, 20 minutes later at 9:55 PM on June 26.

Daylight saving time (DST) is observed in Zaratamo during 2024, starting in the spring on March 31, lasting 6.9 months, and ending in the fall on October 27.

Sunrise & Sunset with Twilight and Daylight Saving Time in Zaratamo

Sunrise & Sunset with Twilight and Daylight Saving Time in ZaratamoJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM2 AMJun 146:30 AMJun 146:30 AM9:55 PMJun 269:55 PMJun 26Dec 85:35 PMDec 85:35 PM8:43 AMJan 48:43 AMJan 4Mar 31DSTMar 31DSTDSTOct 27DSTOct 27daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 Zaratamo

Solar Elevation and Azimuth in ZaratamoJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM0000101010202020303030404050606000010101010202020303040405050602370NowNow
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 Zaratamo

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.

Zaratamo experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 2.6 months, from June 25 to September 13, during which time the comfort level is muggy, oppressive, or miserable at least 3% of the time. The month with the most muggy days in Zaratamo is August, with 3.0 days that are muggy or worse.

The least muggy day of the year is March 9, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Zaratamo

Humidity Comfort Levels in ZaratamomuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Mar 90%Mar 90%Aug 711%Aug 711%Jun 253%Jun 253%Sep 133%Sep 133%NowNowmuggymuggyhumidhumidcomfortablecomfortabledrydry
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 0.0d0.0d0.0d0.0d0.0d0.5d2.5d3.0d0.8d0.0d0.0d0.0d

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 Zaratamo experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 6.4 months, from October 11 to April 24, with average wind speeds of more than 9.5 miles per hour. The windiest month of the year in Zaratamo is December, with an average hourly wind speed of 11.5 miles per hour.

The calmer time of year lasts for 5.6 months, from April 24 to October 11. The calmest month of the year in Zaratamo is August, with an average hourly wind speed of 7.4 miles per hour.

Average Wind Speed in Zaratamo

Average Wind Speed in ZaratamowindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mph20 mph20 mphDec 2811.7 mphDec 2811.7 mphAug 37.3 mphAug 37.3 mphOct 119.5 mphOct 119.5 mphApr 249.5 mphApr 249.5 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) 11.511.110.39.98.47.77.57.48.29.710.911.5

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

The wind is most often from the west for 3.2 months, from January 7 to April 13 and for 1.3 weeks, from November 16 to November 25, with a peak percentage of 37% on January 16. The wind is most often from the north for 5.6 months, from April 13 to October 1, with a peak percentage of 54% on July 23. The wind is most often from the south for 1.5 months, from October 1 to November 16 and for 1.4 months, from November 25 to January 7, with a peak percentage of 38% on October 28.

Wind Direction in Zaratamo

Wind Direction in ZaratamoWNSSJanFebMarAprMayJunJulAugSepOctNovDec0%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).

Zaratamo 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 2.6 months, from July 5 to September 24, with an average temperature above 68°F. The month of the year in Zaratamo with the warmest water is August, with an average temperature of 71°F.

The time of year with cooler water lasts for 4.8 months, from December 9 to May 3, with an average temperature below 57°F. The month of the year in Zaratamo with the coolest water is February, with an average temperature of 54°F.

Average Water Temperature in Zaratamo

Average Water Temperature in ZaratamowarmcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°FAug 1271°FAug 1271°F54°FFeb 2554°FFeb 25Jul 568°FJul 568°FSep 2468°FSep 2468°FDec 957°FDec 957°FMay 357°FMay 357°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 55°F54°F54°F56°F59°F64°F69°F71°F69°F64°F60°F57°F

To characterize how pleasant the weather is in Zaratamo 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 Zaratamo for general outdoor tourist activities is from late June to early September, with a peak score in the third week of July.

Tourism Score in Zaratamo

Tourism Score in Zaratamobest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810108.18.11.11.1NowNowtemperaturetemperature 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 Zaratamo for hot-weather activities is from mid July to late August, with a peak score in the first week of August.

Beach/Pool Score in Zaratamo

Beach/Pool Score in ZaratamoJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.55.50.00.0NowNowtemperaturetemperature 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).

The growing season in Zaratamo typically lasts for 10 months (306 days), from around February 17 to around December 19, rarely starting after March 16, or ending before November 15.

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

Time Spent in Various Temperature Bands and the Growing Season in Zaratamogrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Feb 1750%Feb 1750%Dec 1950%Dec 1990%Mar 1690%Mar 1690%Nov 1590%Nov 1520%Jan 1620%Jan 16Jul 16100%Jul 16100%NowNowvery coldcoldcoolcomfortablewarm
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 Zaratamo should appear around March 4, only rarely appearing before February 11 or after March 25.

Growing Degree Days in Zaratamo

Growing Degree Days in ZaratamoJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°FMar 489°FMar 489°FJun 25900°FJun 25900°FAug 171,800°FAug 171,800°FDec 312,959°FDec 312,959°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 3.2 months, from May 14 to August 20, with an average daily incident shortwave energy per square meter above 6.1 kWh. The brightest month of the year in Zaratamo is July, with an average of 7.1 kWh.

The darker period of the year lasts for 3.6 months, from October 27 to February 16, with an average daily incident shortwave energy per square meter below 2.6 kWh. The darkest month of the year in Zaratamo is December, with an average of 1.5 kWh.

Average Daily Incident Shortwave Solar Energy in Zaratamo

Average Daily Incident Shortwave Solar Energy in ZaratamobrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJul 57.2 kWhJul 57.2 kWhDec 261.5 kWhDec 261.5 kWhMay 146.1 kWhMay 146.1 kWhAug 206.1 kWhAug 206.1 kWhOct 272.6 kWhOct 272.6 kWhFeb 162.6 kWhFeb 162.6 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) 1.72.63.95.16.16.97.16.24.73.11.91.5

For the purposes of this report, the geographical coordinates of Zaratamo are 43.217 deg latitude, -2.867 deg longitude, and 502 ft elevation.

The topography within 2 miles of Zaratamo contains very significant variations in elevation, with a maximum elevation change of 1,709 feet and an average elevation above sea level of 489 feet. Within 10 miles contains very significant variations in elevation (3,566 feet). Within 50 miles also contains extreme variations in elevation (5,571 feet).

The area within 2 miles of Zaratamo is covered by trees (55%), artificial surfaces (25%), and grassland (19%), within 10 miles by trees (62%) and grassland (24%), and within 50 miles by water (35%) and trees (32%).

This report illustrates the typical weather in Zaratamo, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Zaratamo.

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

The estimated value at Zaratamo is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Zaratamo and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Zaratamo and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

Please review our full terms contained on our Terms of Service page.