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Climate and Average Weather Year Round in Bucharest Romania

In Bucharest, the summers are warm and mostly clear and the winters are very cold, snowy, and partly cloudy. Over the course of the year, the temperature typically varies from 24°F to 86°F and is rarely below 11°F or above 94°F.

Based on the beach/pool score, the best time of year to visit Bucharest for hot-weather activities is from early July to mid August.

Climate in Bucharest

very coldcoldcoolwarmhotwarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow85%85%41%41%clearovercastprecipitation: 2.0 inprecipitation: 2.0 in0.8 in0.8 inmuggy: 22%muggy: 22%0%0%drydrybeach/pool score: 7.6beach/pool score: 7.60.00.0
Bucharest weather by month. Click on each chart for more information.

The hot season lasts for 3.7 months, from May 24 to September 13, with an average daily high temperature above 76°F. The hottest month of the year in Bucharest is July, with an average high of 85°F and low of 63°F.

The cold season lasts for 3.4 months, from November 22 to March 2, with an average daily high temperature below 46°F. The coldest month of the year in Bucharest is January, with an average low of 25°F and high of 36°F.

Average High and Low Temperature in Bucharest

Average High and Low Temperature in BucharesthotcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2036°FJan 2036°FJul 3086°FJul 3086°F24°F24°F63°F63°FMay 2476°FMay 2476°FSep 1376°FSep 1376°FNov 2246°FNov 2246°FMar 246°FMar 246°F54°F54°F54°F54°F34°F34°F30°F30°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 36°F41°F52°F63°F74°F81°F85°F84°F75°F63°F49°F39°F
Temp. 30°F33°F43°F53°F63°F70°F74°F73°F64°F53°F42°F33°F
Low 25°F27°F34°F43°F52°F59°F63°F61°F54°F44°F35°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 Bucharest

Average Hourly Temperature in BucharestJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldcoldcoldcoolcomfortablecomfortablewarmfreezingfreezing
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.

Columbus, Ohio, United States (5,140 miles away) is the far-away foreign place with temperatures most similar to Bucharest (view comparison).

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In Bucharest, 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 Bucharest begins around June 6 and lasts for 3.7 months, ending around September 26.

The clearest month of the year in Bucharest is July, during which on average the sky is clear, mostly clear, or partly cloudy 83% of the time.

The cloudier part of the year begins around September 26 and lasts for 8.3 months, ending around June 6.

The cloudiest month of the year in Bucharest is December, during which on average the sky is overcast or mostly cloudy 58% of the time.

Cloud Cover Categories in Bucharest

Cloud Cover Categories in BucharestclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2385%Jul 2385%Dec 441%Dec 441%Jun 662%Jun 662%Sep 2663%Sep 2663%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 56%56%53%50%43%31%17%20%32%44%54%58%
Clearer 44%44%47%50%57%69%83%80%68%56%46%42%

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

The wetter season lasts 2.8 months, from May 1 to July 27, with a greater than 20% chance of a given day being a wet day. The month with the most wet days in Bucharest is June, with an average of 8.6 days with at least 0.04 inches of precipitation.

The drier season lasts 9.2 months, from July 27 to May 1. The month with the fewest wet days in Bucharest is January, with an average of 4.3 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 Bucharest is June, with an average of 8.6 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 29% on June 10.

Daily Chance of Precipitation in Bucharest

Daily Chance of Precipitation in BucharestwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 1029%Jun 1029%Oct 2912%Oct 2912%May 120%May 120%Jul 2720%Jul 2720%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 1.8d2.2d3.6d5.6d7.6d8.6d7.1d5.6d4.8d4.2d3.4d2.7d
Mixed 0.9d0.7d0.4d0.1d0.0d0.0d0.0d0.0d0.0d0.1d0.6d1.0d
Snow 1.6d1.3d0.4d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.5d1.4d
Any 4.3d4.2d4.3d5.7d7.6d8.6d7.1d5.6d4.8d4.4d4.5d5.1d

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. Bucharest experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Bucharest. The month with the most rain in Bucharest is June, with an average rainfall of 2.0 inches.

The month with the least rain in Bucharest is January, with an average rainfall of 0.5 inches.

Average Monthly Rainfall in Bucharest

Average Monthly Rainfall in BucharestJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 inJun 182.0 inJun 182.0 inFeb 20.5 inFeb 20.5 inSep 271.6 inSep 271.6 inNov 231.0 inNov 231.0 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 0.5″0.5″0.8″1.3″1.5″2.0″1.7″1.3″1.4″1.3″1.0″0.7″

Snowfall

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

The snowy period of the year lasts for 4.4 months, from November 7 to March 18, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Bucharest is January, with an average snowfall of 4.1 inches.

The snowless period of the year lasts for 7.6 months, from March 18 to November 7. The least snow falls around July 20, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Bucharest

Average Monthly Snowfall in BucharestsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 inJan 74.3 inJan 74.3 inJul 200.0 inJul 200.0 inNov 71.0 inNov 71.0 inMar 181.0 inMar 181.0 in
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 4.1″3.4″1.1″0.2″0.0″0.0″0.0″0.0″0.0″0.1″1.4″3.4″

The length of the day in Bucharest varies significantly over the course of the year. In 2024, the shortest day is December 21, with 8 hours, 50 minutes of daylight; the longest day is June 20, with 15 hours, 33 minutes of daylight.

Hours of Daylight and Twilight in Bucharest

Hours of Daylight and Twilight in BucharestJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2015 hr, 33 minJun 2015 hr, 33 minJun 2012 hr, 9 minSep 2212 hr, 9 minSep 228 hr, 50 minDec 218 hr, 50 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 9.3h10.5h12.0h13.5h14.8h15.5h15.1h14.0h12.5h11.0h9.6h8.9h

The earliest sunrise is at 5:30 AM on June 15, and the latest sunrise is 2 hours, 21 minutes later at 7:51 AM on January 3. The earliest sunset is at 4:35 PM on December 9, and the latest sunset is 4 hours, 28 minutes later at 9:04 PM on June 26.

Daylight saving time (DST) is observed in Bucharest 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 Bucharest

Sunrise & Sunset with Twilight and Daylight Saving Time in BucharestJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 155:30 AMJun 155:30 AM9:04 PMJun 269:04 PMJun 26Dec 94:35 PMDec 94:35 PM7:51 AMJan 37:51 AMJan 3Mar 31DSTMar 31DSTDSTOct 27DSTOct 27daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
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 Bucharest

Solar Elevation and Azimuth in BucharestJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM00001010102020203030304040506000010101010202020303040405050602269NowNow
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 Bucharest

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.

Bucharest experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 2.7 months, from June 5 to August 29, during which time the comfort level is muggy, oppressive, or miserable at least 5% of the time. The month with the most muggy days in Bucharest is July, with 5.9 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 Bucharest

Humidity Comfort Levels in BucharestmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%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%Jul 2822%Jul 2822%Jun 55%Jun 55%Aug 295%Aug 295%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 0.0d0.0d0.0d0.0d0.4d2.9d5.9d4.1d0.6d0.1d0.0d0.0d

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 Bucharest experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.7 months, from November 15 to May 4, with average wind speeds of more than 7.3 miles per hour. The windiest month of the year in Bucharest is March, with an average hourly wind speed of 8.4 miles per hour.

The calmer time of year lasts for 6.3 months, from May 4 to November 15. The calmest month of the year in Bucharest is July, with an average hourly wind speed of 6.2 miles per hour.

Average Wind Speed in Bucharest

Average Wind Speed in BucharestwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphMar 168.6 mphMar 168.6 mphJul 306.0 mphJul 306.0 mphNov 157.3 mphNov 157.3 mphMay 47.3 mphMay 47.3 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) 7.98.38.48.07.06.46.26.26.97.07.37.7

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

The wind is most often from the east for 3.4 months, from February 22 to June 5 and for 4.0 months, from July 6 to November 7, with a peak percentage of 43% on August 8. The wind is most often from the west for 1.0 months, from June 5 to July 6 and for 3.5 months, from November 7 to February 22, with a peak percentage of 33% on June 13.

Wind Direction in Bucharest

Wind Direction in BucharestWEWEWJanFebMarAprMayJunJulAugSepOctNovDec0%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 Bucharest 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 Bucharest for general outdoor tourist activities is from late May to late September, with a peak score in the last week of August.

Tourism Score in Bucharest

Tourism Score in Bucharestbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.47.40.10.1NowNowtemperaturetemperature 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 Bucharest for hot-weather activities is from early July to mid August, with a peak score in the last week of July.

Beach/Pool Score in Bucharest

Beach/Pool Score in Bucharestbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.67.60.00.0NowNowtemperaturetemperature 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 Bucharest typically lasts for 7.0 months (216 days), from around March 26 to around October 28, rarely starting before March 8 or after April 13, and rarely ending before October 12 or after November 14.

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

Time Spent in Various Temperature Bands and the Growing Season in Bucharestgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 2650%Mar 2650%Oct 2850%Oct 2890%Apr 1390%Apr 1390%Oct 1290%Oct 1210%Mar 810%Mar 810%Nov 1410%Nov 140%Dec 180%Dec 18Jul 11100%Jul 11100%freezingvery coldcoolcomfortablewarmhotcoldfrigid
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 Bucharest should appear around April 4, only rarely appearing before March 20 or after April 22.

Growing Degree Days in Bucharest

Growing Degree Days in BucharestJanFebMarAprMayJunJulAugSepOctNovDec0°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°FApr 489°FApr 489°FJun 13900°FJun 13900°FJul 231,800°FJul 231,800°FDec 313,341°FDec 313,341°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 3.4 months, from May 8 to August 21, with an average daily incident shortwave energy per square meter above 6.0 kWh. The brightest month of the year in Bucharest is July, with an average of 7.0 kWh.

The darker period of the year lasts for 3.5 months, from October 29 to February 15, with an average daily incident shortwave energy per square meter below 2.5 kWh. The darkest month of the year in Bucharest is December, with an average of 1.4 kWh.

Average Daily Incident Shortwave Solar Energy in Bucharest

Average Daily Incident Shortwave Solar Energy in BucharestbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJul 67.2 kWhJul 67.2 kWhDec 231.4 kWhDec 231.4 kWhMay 86.0 kWhMay 86.0 kWhAug 216.0 kWhAug 216.0 kWhOct 292.5 kWhOct 292.5 kWhFeb 152.5 kWhFeb 152.5 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) 1.72.53.85.16.26.97.06.24.73.11.91.4

For the purposes of this report, the geographical coordinates of Bucharest are 44.432 deg latitude, 26.106 deg longitude, and 272 ft elevation.

The topography within 2 miles of Bucharest contains only modest variations in elevation, with a maximum elevation change of 187 feet and an average elevation above sea level of 261 feet. Within 10 miles also contains only modest variations in elevation (269 feet). Within 50 miles contains only modest variations in elevation (2,369 feet).

The area within 2 miles of Bucharest is covered by artificial surfaces (99%), within 10 miles by cropland (52%) and artificial surfaces (35%), and within 50 miles by cropland (73%) and trees (12%).

This report illustrates the typical weather in Bucharest, 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 Bucharest.

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