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Climate and Average Weather Year Round in Valle Martella Italy

In Valle Martella, the summers are short, hot, dry, and mostly clear and the winters are long, cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 37°F to 89°F and is rarely below 29°F or above 96°F.

Based on the beach/pool score, the best time of year to visit Valle Martella for hot-weather activities is from late June to late August.

Climate in Valle Martella

coldcoolwarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow88%88%50%50%clearovercastprecipitation: 3.6 inprecipitation: 3.6 in0.6 in0.6 inmuggy: 40%muggy: 40%0%0%drydrybeach/pool score: 8.6beach/pool score: 8.60.00.0
Valle Martella weather by month. Click on each chart for more information.

The hot season lasts for 2.7 months, from June 16 to September 8, with an average daily high temperature above 82°F. The hottest month of the year in Valle Martella is August, with an average high of 87°F and low of 65°F.

The cool season lasts for 4.0 months, from November 19 to March 17, with an average daily high temperature below 60°F. The coldest month of the year in Valle Martella is January, with an average low of 38°F and high of 53°F.

Average High and Low Temperature in Valle Martella

Average High and Low Temperature in Valle MartellahotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 1953°FJan 1953°FAug 589°FAug 589°F37°F37°F66°F66°FJun 1682°FJun 1682°FSep 882°FSep 882°FNov 1960°FNov 1960°FMar 1760°FMar 1760°F61°F61°F61°F61°F45°F45°F42°F42°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 53°F55°F60°F65°F73°F82°F88°F87°F80°F71°F61°F54°F
Temp. 45°F46°F51°F56°F64°F72°F77°F77°F70°F62°F53°F46°F
Low 38°F38°F42°F47°F54°F61°F65°F65°F60°F53°F46°F40°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 Valle Martella

Average Hourly Temperature in Valle MartellaJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldvery coldcoldcoldcoolcoolcomfortablewarmhotvery coldwarmvery 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.

Alta Sierra, California, United States (6,139 miles away) is the far-away foreign place with temperatures most similar to Valle Martella (view comparison).

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In Valle Martella, 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 Valle Martella begins around June 8 and lasts for 3.1 months, ending around September 11.

The clearest month of the year in Valle Martella is July, during which on average the sky is clear, mostly clear, or partly cloudy 87% of the time.

The cloudier part of the year begins around September 11 and lasts for 8.9 months, ending around June 8.

The cloudiest month of the year in Valle Martella is November, during which on average the sky is overcast or mostly cloudy 48% of the time.

Cloud Cover Categories in Valle Martella

Cloud Cover Categories in Valle MartellaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2088%Jul 2088%Nov 2850%Nov 2850%Jun 869%Jun 869%Sep 1169%Sep 1169%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 48%46%45%44%40%26%13%18%32%44%48%47%
Clearer 52%54%55%56%60%74%87%82%68%56%52%53%

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

The wetter season lasts 7.8 months, from September 9 to May 2, with a greater than 22% chance of a given day being a wet day. The month with the most wet days in Valle Martella is November, with an average of 9.7 days with at least 0.04 inches of precipitation.

The drier season lasts 4.2 months, from May 2 to September 9. The month with the fewest wet days in Valle Martella is July, with an average of 3.2 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 Valle Martella is November, with an average of 9.7 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 34% on November 18.

Daily Chance of Precipitation in Valle Martella

Daily Chance of Precipitation in Valle MartellawetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Nov 1834%Nov 1834%Aug 59%Aug 59%Sep 922%Sep 922%May 222%May 222%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 6.9d7.4d6.8d7.0d6.0d4.3d3.2d3.6d7.0d8.6d9.7d7.8d

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. Valle Martella experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Valle Martella. The month with the most rain in Valle Martella is November, with an average rainfall of 3.5 inches.

The month with the least rain in Valle Martella is July, with an average rainfall of 0.7 inches.

Average Monthly Rainfall in Valle Martella

Average Monthly Rainfall in Valle MartellaJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inNov 173.6 inNov 173.6 inJul 240.6 inJul 240.6 inFeb 102.3 inFeb 102.3 inApr 131.8 inApr 131.8 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 2.1″2.3″1.8″1.8″1.4″1.0″0.7″0.9″2.3″3.2″3.5″2.6″

The length of the day in Valle Martella varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 8 minutes of daylight; the longest day is June 20, with 15 hours, 14 minutes of daylight.

Hours of Daylight and Twilight in Valle Martella

Hours of Daylight and Twilight in Valle MartellaJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2015 hr, 14 minJun 2015 hr, 14 minJun 2012 hr, 9 minSep 2212 hr, 9 minSep 229 hr, 8 minDec 219 hr, 8 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 9.5h10.6h12.0h13.4h14.6h15.2h14.9h13.8h12.4h11.0h9.8h9.2h

The earliest sunrise is at 5:33 AM on June 14, and the latest sunrise is 2 hours, 4 minutes later at 7:36 AM on January 4. The earliest sunset is at 4:37 PM on December 8, and the latest sunset is 4 hours, 11 minutes later at 8:48 PM on June 26.

Daylight saving time (DST) is observed in Valle Martella 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 Valle Martella

Sunrise & Sunset with Twilight and Daylight Saving Time in Valle MartellaJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 145:33 AMJun 145:33 AM8:48 PMJun 268:48 PMJun 26Dec 84:37 PMDec 84:37 PM7:36 AMJan 47:36 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 Valle Martella

Solar Elevation and Azimuth in Valle MartellaJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM000010101020202030303040405050606000010101010202020303040405050602572NowNow
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 Valle Martella

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.

Valle Martella experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.4 months, from June 15 to September 27, during which time the comfort level is muggy, oppressive, or miserable at least 10% of the time. The month with the most muggy days in Valle Martella is August, with 11.2 days that are muggy or worse.

The least muggy day of the year is February 23, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Valle Martella

Humidity Comfort Levels in Valle MartellamuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 230%Feb 230%Aug 1240%Aug 1240%Jun 1510%Jun 1510%Sep 2710%Sep 2710%NowNowmuggymuggyhumidhumiddrydrycomfortablecomfortableoppressiveoppressive
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 0.0d0.0d0.0d0.0d0.3d3.3d9.4d11.2d4.9d1.2d0.1d0.0d

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 Valle Martella experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 3.0 months, from January 25 to April 27, with average wind speeds of more than 7.0 miles per hour. The windiest month of the year in Valle Martella is March, with an average hourly wind speed of 7.5 miles per hour.

The calmer time of year lasts for 9.0 months, from April 27 to January 25. The calmest month of the year in Valle Martella is August, with an average hourly wind speed of 6.3 miles per hour.

Average Wind Speed in Valle Martella

Average Wind Speed in Valle MartellawindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphApr 27.7 mphApr 27.7 mphAug 276.3 mphAug 276.3 mphJan 257.0 mphJan 257.0 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) 7.07.37.57.36.66.46.56.36.46.87.37.3

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

The wind is most often from the south for 1.6 months, from March 22 to May 9 and for 1.9 weeks, from September 25 to October 8, with a peak percentage of 31% on October 6. The wind is most often from the west for 4.5 months, from May 9 to September 25, with a peak percentage of 45% on July 22. The wind is most often from the east for 5.5 months, from October 8 to March 22, with a peak percentage of 35% on January 1.

Wind Direction in Valle Martella

Wind Direction in Valle MartellaESWSEJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
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).

Valle Martella 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 2.8 months, from June 28 to September 21, with an average temperature above 74°F. The month of the year in Valle Martella with the warmest water is August, with an average temperature of 77°F.

The time of year with cooler water lasts for 4.4 months, from December 15 to April 28, with an average temperature below 61°F. The month of the year in Valle Martella with the coolest water is February, with an average temperature of 57°F.

Average Water Temperature in Valle Martella

Average Water Temperature in Valle MartellawarmcoolJanFebMarAprMayJunJulAugSepOctNovDec55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°FAug 1078°FAug 1078°F57°FFeb 2557°FFeb 25Jun 2874°FJun 2874°FSep 2174°FSep 2174°FDec 1561°FDec 1561°FApr 2861°FApr 2861°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 58°F57°F57°F60°F65°F71°F76°F77°F74°F70°F65°F61°F

To characterize how pleasant the weather is in Valle Martella 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 Valle Martella for general outdoor tourist activities are from early May to mid July and from late August to early October, with a peak score in the first week of June.

Tourism Score in Valle Martella

Tourism Score in Valle Martellabest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.57.51.11.17.57.56.26.2NowNowtemperaturetemperature 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 Valle Martella for hot-weather activities is from late June to late August, with a peak score in the third week of July.

Beach/Pool Score in Valle Martella

Beach/Pool Score in Valle Martellabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810108.68.60.00.0NowNowtemperaturetemperature 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 Valle Martella typically lasts for 9.5 months (289 days), from around February 26 to around December 11, rarely starting before February 1 or after March 22, and rarely ending before November 15 or after January 3.

Time Spent in Various Temperature Bands and the Growing Season in Valle Martella

Time Spent in Various Temperature Bands and the Growing Season in Valle Martellagrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Feb 2650%Feb 2650%Dec 1150%Dec 1190%Mar 2290%Mar 2290%Nov 1590%Nov 1510%Feb 110%Feb 110%Jan 310%Jan 3Jul 21100%Jul 21100%NowNowvery coldcoldcoolcomfortablewarmhotfreezing
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 Valle Martella should appear around March 5, only rarely appearing before February 17 or after March 24.

Growing Degree Days in Valle Martella

Growing Degree Days in Valle MartellaJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°F3,500°F3,500°F4,000°F4,000°F4,500°F4,500°FMar 585°FMar 585°FJun 4900°FJun 4900°FJul 131,800°FJul 131,800°FDec 314,277°FDec 314,277°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 10 to August 17, with an average daily incident shortwave energy per square meter above 6.5 kWh. The brightest month of the year in Valle Martella is July, with an average of 7.5 kWh.

The darker period of the year lasts for 3.6 months, from October 27 to February 15, with an average daily incident shortwave energy per square meter below 2.9 kWh. The darkest month of the year in Valle Martella is December, with an average of 1.8 kWh.

Average Daily Incident Shortwave Solar Energy in Valle Martella

Average Daily Incident Shortwave Solar Energy in Valle MartellabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJul 57.7 kWhJul 57.7 kWhDec 151.7 kWhDec 151.7 kWhMay 106.5 kWhMay 106.5 kWhAug 176.5 kWhAug 176.5 kWhOct 272.9 kWhOct 272.9 kWhFeb 152.9 kWhFeb 152.9 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) 2.03.04.35.66.77.57.56.54.93.42.21.8

For the purposes of this report, the geographical coordinates of Valle Martella are 41.878 deg latitude, 12.747 deg longitude, and 417 ft elevation.

The topography within 2 miles of Valle Martella contains significant variations in elevation, with a maximum elevation change of 545 feet and an average elevation above sea level of 370 feet. Within 10 miles contains significant variations in elevation (3,881 feet). Within 50 miles also contains extreme variations in elevation (8,097 feet).

The area within 2 miles of Valle Martella is covered by cropland (84%) and artificial surfaces (14%), within 10 miles by cropland (61%) and trees (19%), and within 50 miles by cropland (37%) and trees (27%).

This report illustrates the typical weather in Valle Martella, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Valle Martella.

For each station, the records are corrected for the elevation difference between that station and Valle Martella 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 Valle Martella is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Valle Martella 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 Valle Martella 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.