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Climate and Average Weather Year Round in Karlovy Vary Czechia

In Karlovy Vary, the summers are comfortable and partly cloudy and the winters are freezing, snowy, windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 25°F to 73°F and is rarely below 11°F or above 85°F.

Based on the tourism score, the best time of year to visit Karlovy Vary for warm-weather activities is from late June to late August.

Climate in Karlovy Vary

very coldcoldcoolcomfortablecoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow56%56%30%30%overcastclearprecipitation: 2.6 inprecipitation: 2.6 in0.8 in0.8 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 6.6tourism score: 6.60.00.0
Karlovy Vary weather by month. Click on each chart for more information.

The warm season lasts for 3.4 months, from May 28 to September 8, with an average daily high temperature above 66°F. The hottest month of the year in Karlovy Vary is July, with an average high of 72°F and low of 54°F.

The cold season lasts for 3.7 months, from November 15 to March 6, with an average daily high temperature below 42°F. The coldest month of the year in Karlovy Vary is January, with an average low of 26°F and high of 34°F.

Average High and Low Temperature in Karlovy Vary

Average High and Low Temperature in Karlovy VarywarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FFeb 935°FFeb 935°FAug 473°FAug 473°F25°F25°F55°F55°FMay 2866°FMay 2866°FSep 866°FSep 866°FNov 1542°FNov 1542°F48°F48°F49°F49°F34°F34°F29°F29°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 34°F37°F45°F54°F63°F68°F72°F71°F64°F53°F42°F36°F
Temp. 30°F31°F38°F46°F55°F60°F64°F63°F56°F47°F38°F32°F
Low 26°F26°F32°F38°F45°F51°F54°F53°F48°F40°F33°F28°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 Karlovy Vary

Average Hourly Temperature in Karlovy VaryJanFebMarAprMayJunJulAugSepOctNovDec12 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 AMNowNowfreezingfreezingvery coldvery coldcoldcoldcoolcomfortablefreezingfreezing
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.

Kitimat, Canada (4,900 miles away) is the far-away foreign place with temperatures most similar to Karlovy Vary (view comparison).

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In Karlovy Vary, 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 Karlovy Vary begins around April 6 and lasts for 5.9 months, ending around October 3.

The clearest month of the year in Karlovy Vary is August, during which on average the sky is clear, mostly clear, or partly cloudy 55% of the time.

The cloudier part of the year begins around October 3 and lasts for 6.1 months, ending around April 6.

The cloudiest month of the year in Karlovy Vary is December, during which on average the sky is overcast or mostly cloudy 69% of the time.

Cloud Cover Categories in Karlovy Vary

Cloud Cover Categories in Karlovy VaryclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 356%Aug 356%Nov 2130%Nov 2130%Apr 643%Apr 643%Oct 343%Oct 343%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 65%61%60%56%54%50%45%45%51%61%69%69%
Clearer 35%39%40%44%46%50%55%55%49%39%31%31%

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

The wetter season lasts 3.9 months, from May 7 to September 5, with a greater than 26% chance of a given day being a wet day. The month with the most wet days in Karlovy Vary is June, with an average of 10.3 days with at least 0.04 inches of precipitation.

The drier season lasts 8.1 months, from September 5 to May 7. The month with the fewest wet days in Karlovy Vary is February, with an average of 5.4 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 Karlovy Vary is June, with an average of 10.3 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 35% on June 10.

Daily Chance of Precipitation in Karlovy Vary

Daily Chance of Precipitation in Karlovy VarywetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 1035%Jun 1035%Feb 2717%Feb 2717%May 726%May 726%Sep 526%Sep 526%NowNowrainsnow
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 4.1d3.6d5.3d6.2d8.9d10.3d10.3d9.1d7.3d6.4d5.7d4.8d
Mixed 0.8d0.5d0.4d0.2d0.0d0.0d0.0d0.0d0.0d0.0d0.3d0.8d
Snow 1.5d1.2d0.5d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.5d1.2d
Any 6.4d5.4d6.3d6.4d8.9d10.3d10.3d9.1d7.3d6.4d6.5d6.9d

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. Karlovy Vary experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Karlovy Vary. The month with the most rain in Karlovy Vary is July, with an average rainfall of 2.5 inches.

The month with the least rain in Karlovy Vary is February, with an average rainfall of 0.6 inches.

Average Monthly Rainfall in Karlovy Vary

Average Monthly Rainfall in Karlovy VaryJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 inJul 192.6 inJul 192.6 inFeb 150.6 inFeb 150.6 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 0.8″0.6″0.9″1.1″1.9″2.4″2.5″2.2″1.7″1.3″1.2″1.0″

Snowfall

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

The snowy period of the year lasts for 4.1 months, from November 14 to March 18, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Karlovy Vary is January, with an average snowfall of 2.4 inches.

The snowless period of the year lasts for 7.9 months, from March 18 to November 14. The least snow falls around July 28, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Karlovy Vary

Average Monthly Snowfall in Karlovy VarysnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inJan 162.4 inJan 162.4 inJul 280.0 inJul 280.0 inNov 141.0 inNov 141.0 inMar 181.0 inMar 181.0 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 2.4″2.1″1.1″0.2″0.0″0.0″0.0″0.0″0.0″0.1″1.0″2.1″

The length of the day in Karlovy Vary varies extremely over the course of the year. In 2024, the shortest day is December 21, with 8 hours, 2 minutes of daylight; the longest day is June 20, with 16 hours, 25 minutes of daylight.

Hours of Daylight and Twilight in Karlovy Vary

Hours of Daylight and Twilight in Karlovy VaryJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 2012 hr, 8 minMar 2016 hr, 25 minJun 2016 hr, 25 minJun 2012 hr, 11 minSep 2212 hr, 11 minSep 228 hr, 2 minDec 218 hr, 2 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 8.6h10.1h11.9h13.8h15.5h16.3h15.9h14.4h12.6h10.7h9.0h8.1h

The earliest sunrise is at 4:57 AM on June 16, and the latest sunrise is 3 hours, 11 minutes later at 8:08 AM on December 31. The earliest sunset is at 4:05 PM on December 11, and the latest sunset is 5 hours, 18 minutes later at 9:23 PM on June 25.

Daylight saving time (DST) is observed in Karlovy Vary 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 Karlovy Vary

Sunrise & Sunset with Twilight and Daylight Saving Time in Karlovy VaryJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 164:57 AMJun 164:57 AM9:23 PMJun 259:23 PMJun 25Dec 114:05 PMDec 114:05 PM8:08 AMDec 318:08 AMDec 31Mar 31DSTMar 31DSTDSTOct 27DSTOct 27daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunsetNowNow
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 Karlovy Vary

Solar Elevation and Azimuth in Karlovy VaryJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM0000101010202030304040500001010101020203030404050601663NowNow
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 Karlovy Vary

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 Karlovy Vary, 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 Karlovy Vary

Humidity Comfort Levels in Karlovy VaryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Mar 60%Mar 60%Jul 20%Jul 20%comfortablecomfortabledrydryhumidhumid
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 0.0d0.0d0.0d0.0d0.0d0.1d0.1d0.1d0.0d0.0d0.0d0.0d

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 Karlovy Vary experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 4.7 months, from November 15 to April 5, with average wind speeds of more than 8.5 miles per hour. The windiest month of the year in Karlovy Vary is January, with an average hourly wind speed of 10.2 miles per hour.

The calmer time of year lasts for 7.3 months, from April 5 to November 15. The calmest month of the year in Karlovy Vary is August, with an average hourly wind speed of 6.8 miles per hour.

Average Wind Speed in Karlovy Vary

Average Wind Speed in Karlovy VarywindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mphJan 2710.3 mphJan 2710.3 mphAug 76.6 mphAug 76.6 mphNov 158.5 mphNov 158.5 mphApr 58.5 mphApr 58.5 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) 10.29.89.37.97.37.07.06.87.47.98.59.5

The predominant average hourly wind direction in Karlovy Vary is from the west throughout the year.

Wind Direction in Karlovy Vary

Wind Direction in Karlovy VaryJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwesteastnorthsouth
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 Karlovy Vary 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 Karlovy Vary for general outdoor tourist activities is from late June to late August, with a peak score in the first week of August.

Tourism Score in Karlovy Vary

Tourism Score in Karlovy Varybest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.66.60.00.0NowNowtemperaturetemperature 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 Karlovy Vary for hot-weather activities is from mid July to mid August, with a peak score in the first week of August.

Beach/Pool Score in Karlovy Vary

Beach/Pool Score in Karlovy VaryJanFebMarAprMayJunJulAugSepOctNovDec002244668810103.53.50.00.0NowNowtemperaturetemperature cloudscloudsprecipitationprecipitation
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 Karlovy Vary typically lasts for 6.0 months (181 days), from around April 20 to around October 18, rarely starting before April 2 or after May 8, and rarely ending before September 29 or after November 10.

Time Spent in Various Temperature Bands and the Growing Season in Karlovy Vary

Time Spent in Various Temperature Bands and the Growing Season in Karlovy Varygrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 2050%Apr 2050%Oct 1850%Oct 1890%May 890%May 890%Sep 2990%Sep 2910%Apr 210%Apr 210%Nov 1010%Nov 100%Feb 90%Feb 9Jul 17100%Jul 17100%NowNowfreezingvery coldcoldcoolcomfortablewarmfrigid
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 Karlovy Vary should appear around April 30, only rarely appearing before April 17 or after May 14.

Growing Degree Days in Karlovy Vary

Growing Degree Days in Karlovy VaryJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F200°F200°F400°F400°F600°F600°F800°F800°F1,000°F1,000°F1,200°F1,200°F1,400°F1,400°F1,600°F1,600°F1,800°F1,800°FApr 3090°FApr 3090°FJul 22900°FJul 22900°FDec 311,695°FDec 311,695°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 3.7 months, from April 28 to August 17, with an average daily incident shortwave energy per square meter above 5.3 kWh. The brightest month of the year in Karlovy Vary is June, with an average of 6.4 kWh.

The darker period of the year lasts for 3.6 months, from October 26 to February 15, with an average daily incident shortwave energy per square meter below 1.9 kWh. The darkest month of the year in Karlovy Vary is December, with an average of 0.8 kWh.

Average Daily Incident Shortwave Solar Energy in Karlovy Vary

Average Daily Incident Shortwave Solar Energy in Karlovy VarybrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 276.5 kWhJun 276.5 kWhDec 230.8 kWhDec 230.8 kWhApr 285.3 kWhApr 285.3 kWhAug 175.3 kWhAug 175.3 kWhOct 261.9 kWhOct 261.9 kWhFeb 151.9 kWhFeb 151.9 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) 1.11.93.24.75.96.46.35.44.02.41.20.8

For the purposes of this report, the geographical coordinates of Karlovy Vary are 50.233 deg latitude, 12.871 deg longitude, and 1,224 ft elevation.

The topography within 2 miles of Karlovy Vary contains very significant variations in elevation, with a maximum elevation change of 961 feet and an average elevation above sea level of 1,438 feet. Within 10 miles contains very significant variations in elevation (2,470 feet). Within 50 miles contains large variations in elevation (3,937 feet).

The area within 2 miles of Karlovy Vary is covered by artificial surfaces (41%), trees (40%), and cropland (14%), within 10 miles by trees (56%) and grassland (18%), and within 50 miles by cropland (41%) and trees (41%).

This report illustrates the typical weather in Karlovy Vary, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Karlovy Vary.

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