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Climate and Average Weather Year Round in Guarda Portugal

In Guarda, the summers are short, warm, dry, and mostly clear and the winters are very cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 32°F to 82°F and is rarely below 24°F or above 90°F.

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

Climate in Guarda

coldcoolwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow86%86%37%37%clearovercastprecipitation: 4.7 inprecipitation: 4.7 in0.3 in0.3 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 8.4tourism score: 8.40.10.1
Guarda weather by month. Click on each chart for more information.

The warm season lasts for 2.8 months, from June 20 to September 13, with an average daily high temperature above 75°F. The hottest month of the year in Guarda is August, with an average high of 81°F and low of 55°F.

The cool season lasts for 3.7 months, from November 14 to March 3, with an average daily high temperature below 53°F. The coldest month of the year in Guarda is January, with an average low of 32°F and high of 47°F.

Average High and Low Temperature in Guarda

Average High and Low Temperature in GuardawarmcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 1546°FJan 1546°FJul 2982°FJul 2982°F32°F32°F56°F56°FJun 2075°FJun 2075°FSep 1375°FSep 1375°FNov 1453°FNov 1453°FMar 353°FMar 353°F52°F52°F52°F52°F38°F38°F35°F35°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 47°F50°F55°F58°F65°F74°F80°F81°F74°F63°F53°F47°F
Temp. 38°F41°F46°F49°F55°F63°F68°F68°F62°F54°F45°F40°F
Low 32°F34°F37°F40°F45°F51°F55°F55°F52°F45°F38°F34°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 Guarda

Average Hourly Temperature in GuardaJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldvery coldvery coldcoldcoldcoolcomfortablewarm
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.

Oakridge, Oregon, United States (5,364 miles away) is the far-away foreign place with temperatures most similar to Guarda (view comparison).

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In Guarda, 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 Guarda begins around June 5 and lasts for 3.4 months, ending around September 17.

The clearest month of the year in Guarda is July, during which on average the sky is clear, mostly clear, or partly cloudy 84% of the time.

The cloudier part of the year begins around September 17 and lasts for 8.6 months, ending around June 5.

The cloudiest month of the year in Guarda is December, during which on average the sky is overcast or mostly cloudy 62% of the time.

Cloud Cover Categories in Guarda

Cloud Cover Categories in GuardaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2086%Jul 2086%Dec 1537%Dec 1537%Jun 561%Jun 561%Sep 1762%Sep 1762%NowNowclearpartly cloudymostly cloudyovercastmostly clear
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 60%56%54%52%45%32%16%21%37%52%61%62%
Clearer 40%44%46%48%55%68%84%79%63%48%39%38%

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

The wetter season lasts 8.2 months, from September 23 to May 29, with a greater than 19% chance of a given day being a wet day. The month with the most wet days in Guarda is November, with an average of 9.6 days with at least 0.04 inches of precipitation.

The drier season lasts 3.8 months, from May 29 to September 23. The month with the fewest wet days in Guarda is July, with an average of 1.7 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Guarda is November, with an average of 9.5 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 34% on October 30.

Daily Chance of Precipitation in Guarda

Daily Chance of Precipitation in GuardawetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Oct 3034%Oct 3034%Jul 305%Jul 305%Sep 2319%Sep 2319%May 2919%May 2919%NowNowrainmixed
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 8.5d6.8d7.4d8.9d7.6d3.6d1.7d2.0d4.8d9.4d9.5d9.3d
Mixed 0.6d0.6d0.2d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.1d0.3d
Snow 0.2d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.1d
Any 9.3d7.4d7.6d8.9d7.6d3.6d1.7d2.0d4.8d9.4d9.6d9.7d

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. Guarda experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 11 months, from August 16 to July 1, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Guarda is November, with an average rainfall of 4.5 inches.

The rainless period of the year lasts for 1.5 months, from July 1 to August 16. The month with the least rain in Guarda is July, with an average rainfall of 0.3 inches.

Average Monthly Rainfall in Guarda

Average Monthly Rainfall in GuardarainrainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 in14 in14 inNov 24.7 inNov 24.7 inJul 230.3 inJul 230.3 inDec 264.6 inDec 264.6 inApr 143.0 inApr 143.0 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 3.8″3.1″2.4″3.0″2.2″0.9″0.3″0.5″1.7″4.2″4.5″4.5″

Snowfall

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

The snowy period of the year lasts for 1.2 months, from December 15 to January 20, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Guarda is January, with an average snowfall of 1.2 inches.

The snowless period of the year lasts for 11 months, from January 20 to December 15. The least snow falls around July 21, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Guarda

Average Monthly Snowfall in GuardaJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 inJan 31.6 inJan 31.6 inJul 210.0 inJul 210.0 inDec 151.0 inDec 151.0 inNowNow
The average snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Snowfall 1.2″0.5″0.2″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.1″1.1″

The length of the day in Guarda varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 16 minutes of daylight; the longest day is June 20, with 15 hours, 5 minutes of daylight.

Hours of Daylight and Twilight in Guarda

Hours of Daylight and Twilight in GuardaJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2015 hr, 5 minJun 2015 hr, 5 minJun 2012 hr, 9 minSep 2212 hr, 9 minSep 229 hr, 16 minDec 219 hr, 16 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 9.6h10.7h12.0h13.3h14.5h15.0h14.7h13.7h12.4h11.1h9.9h9.3h

The earliest sunrise is at 5:57 AM on June 14, and the latest sunrise is 1 hour, 55 minutes later at 7:52 AM on January 5. The earliest sunset is at 5:01 PM on December 7, and the latest sunset is 4 hours, 2 minutes later at 9:03 PM on June 27.

Daylight saving time (DST) is observed in Guarda 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 Guarda

Sunrise & Sunset with Twilight and Daylight Saving Time in GuardaJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 145:57 AMJun 145:57 AM9:03 PMJun 279:03 PMJun 27Dec 75:01 PMDec 75:01 PM7:52 AMJan 57:52 AMJan 5Mar 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 Guarda

Solar Elevation and Azimuth in GuardaJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM0000101010202020303030304040505060607000010101010202020303040405050602673NowNow
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 Guarda

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

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

Humidity Comfort Levels in Guarda

Humidity Comfort Levels in GuardaJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 220%Jan 220%Aug 130%Aug 130%NowNowcomfortablecomfortabledrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d

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

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

The windier part of the year lasts for 6.5 months, from October 21 to May 5, with average wind speeds of more than 8.7 miles per hour. The windiest month of the year in Guarda is April, with an average hourly wind speed of 9.2 miles per hour.

The calmer time of year lasts for 5.5 months, from May 5 to October 21. The calmest month of the year in Guarda is September, with an average hourly wind speed of 7.9 miles per hour.

Average Wind Speed in Guarda

Average Wind Speed in GuardawindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphApr 69.6 mphApr 69.6 mphSep 127.8 mphSep 127.8 mphOct 218.7 mphOct 218.7 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 8.99.19.29.28.58.18.28.17.98.69.09.2

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

The wind is most often from the east for 4.1 weeks, from January 15 to February 13; for 1.6 weeks, from February 21 to March 3; and for 1.2 months, from November 15 to December 20, with a peak percentage of 30% on December 13. The wind is most often from the north for 1.1 weeks, from February 13 to February 21; for 4.3 weeks, from March 3 to April 2; for 1.0 weeks, from April 17 to April 24; for 3.4 months, from June 2 to September 15; and for 6.0 days, from September 22 to September 28, with a peak percentage of 42% on July 10. The wind is most often from the south for 1.4 months, from October 4 to November 15 and for 3.7 weeks, from December 20 to January 15, with a peak percentage of 32% on October 28.

Wind Direction in Guarda

Wind Direction in GuardaSEENWWNSESJanFebMarAprMayJunJulAugSepOctNovDec0%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).

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

Tourism Score in Guarda

Tourism Score in Guardabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810108.48.40.10.1NowNowtemperaturetemperature 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 Guarda for hot-weather activities is from mid July to mid August, with a peak score in the last week of July.

Beach/Pool Score in Guarda

Beach/Pool Score in GuardaJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.76.70.00.0NowNowtemperaturetemperature 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 Guarda typically lasts for 7.0 months (215 days), from around April 12 to around November 12, rarely starting before March 16 or after May 7, and rarely ending before October 24 or after December 4.

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

Time Spent in Various Temperature Bands and the Growing Season in Guardagrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 1250%Apr 1250%Nov 1250%Nov 1290%May 790%May 790%Oct 2490%Oct 2410%Mar 1610%Mar 1610%Dec 410%Dec 40%Feb 20%Feb 2Jul 29100%Jul 29100%very coldcoldcoolcomfortablewarmhot
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 Guarda should appear around April 6, only rarely appearing before March 20 or after April 25.

Growing Degree Days in Guarda

Growing Degree Days in GuardaJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°FApr 690°FApr 690°FJul 9900°FJul 9900°FAug 281,800°FAug 281,800°FDec 312,425°FDec 312,425°F
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 3.1 months, from May 16 to August 21, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest month of the year in Guarda is July, with an average of 8.0 kWh.

The darker period of the year lasts for 3.6 months, from October 25 to February 14, with an average daily incident shortwave energy per square meter below 3.0 kWh. The darkest month of the year in Guarda is December, with an average of 1.8 kWh.

Average Daily Incident Shortwave Solar Energy in Guarda

Average Daily Incident Shortwave Solar Energy in GuardabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhJul 78.1 kWhJul 78.1 kWhDec 191.7 kWhDec 191.7 kWhMay 166.9 kWhMay 166.9 kWhAug 216.9 kWhAug 216.9 kWhOct 253.0 kWhOct 253.0 kWhFeb 143.0 kWhFeb 143.0 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) 2.03.14.55.76.97.88.07.15.43.52.31.8

For the purposes of this report, the geographical coordinates of Guarda are 40.537 deg latitude, -7.266 deg longitude, and 3,307 ft elevation.

The topography within 2 miles of Guarda contains very significant variations in elevation, with a maximum elevation change of 837 feet and an average elevation above sea level of 2,934 feet. Within 10 miles contains very significant variations in elevation (2,890 feet). Within 50 miles contains large variations in elevation (6,385 feet).

The area within 2 miles of Guarda is covered by artificial surfaces (29%), trees (25%), cropland (25%), and grassland (19%), within 10 miles by trees (39%) and cropland (32%), and within 50 miles by trees (42%) and cropland (36%).

This report illustrates the typical weather in Guarda, 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 Guarda.

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