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Climate and Average Weather Year Round in Tanggu China

In Tanggu, the summers are long, warm, muggy, wet, and partly cloudy and the winters are freezing, snowy, windy, and mostly clear. Over the course of the year, the temperature typically varies from 20°F to 85°F and is rarely below 13°F or above 91°F.

Based on the tourism score, the best times of year to visit Tanggu for warm-weather activities are from mid May to late June and from mid August to late September.

Climate in Tanggu

very coldcoldcoolwarmhotwarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow75%75%57%57%clearovercastprecipitation: 5.5 inprecipitation: 5.5 in0.0 in0.0 inmuggy: 93%muggy: 93%0%0%drydrytourism score: 7.6tourism score: 7.60.00.0
Tanggu weather by month. Click on each chart for more information.

The hot season lasts for 4.2 months, from May 18 to September 24, with an average daily high temperature above 75°F. The hottest month of the year in Tanggu is July, with an average high of 84°F and low of 74°F.

The cold season lasts for 3.0 months, from November 27 to February 29, with an average daily high temperature below 44°F. The coldest month of the year in Tanggu is January, with an average low of 20°F and high of 35°F.

Average High and Low Temperature in Tanggu

Average High and Low Temperature in TangguhotcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 1834°FJan 1834°FJul 2885°FJul 2885°F20°F20°F75°F75°FMay 1875°FMay 1875°FSep 2475°FSep 2475°FNov 2744°FNov 2744°FFeb 2944°FFeb 2944°F61°F61°F61°F61°F31°F31°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 35°F40°F51°F64°F74°F81°F84°F84°F78°F66°F50°F38°F
Temp. 27°F32°F43°F57°F67°F74°F79°F78°F71°F59°F43°F32°F
Low 20°F25°F37°F50°F61°F69°F74°F72°F64°F51°F36°F25°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 Tanggu

Average Hourly Temperature in TangguJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldcoldcoldcoolcoolcomfortablewarmfreezingcomfortablefreezing
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.

Warsaw, Illinois, United States (6,661 miles away) is the far-away foreign place with temperatures most similar to Tanggu (view comparison).

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In Tanggu, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year in Tanggu begins around September 6 and lasts for 5.4 months, ending around February 17.

The clearest month of the year in Tanggu is December, during which on average the sky is clear, mostly clear, or partly cloudy 74% of the time.

The cloudier part of the year begins around February 17 and lasts for 6.7 months, ending around September 6.

The cloudiest month of the year in Tanggu is June, during which on average the sky is overcast or mostly cloudy 42% of the time.

Cloud Cover Categories in Tanggu

Cloud Cover Categories in TangguclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Dec 1275%Dec 1275%Jun 1757%Jun 1757%Sep 666%Sep 666%Feb 1766%Feb 1766%NowNowclearmostly clearovercast
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 27%33%38%39%41%42%40%37%33%30%28%26%
Clearer 73%67%62%61%59%58%60%63%67%70%72%74%

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

The wetter season lasts 3.2 months, from June 4 to September 10, with a greater than 18% chance of a given day being a wet day. The month with the most wet days in Tanggu is July, with an average of 10.7 days with at least 0.04 inches of precipitation.

The drier season lasts 8.8 months, from September 10 to June 4. The month with the fewest wet days in Tanggu is January, with an average of 0.3 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. Based on this categorization, the most common form of precipitation in Tanggu changes throughout the year.

Rain alone is the most common for 10 months, from February 11 to December 15. The month with the most days of rain alone in Tanggu is July, with an average of 10.7 days.

Snow alone is the most common for 1.9 months, from December 15 to February 11. The month with the most days of snow alone in Tanggu is January, with an average of 0.2 days.

Daily Chance of Precipitation in Tanggu

Daily Chance of Precipitation in TanggusnowrainJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 3136%Jul 3136%Jan 221%Jan 221%Dec 151%Dec 151%Jun 418%Jun 418%Sep 1018%Sep 1018%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 0.0d0.3d1.2d2.9d4.5d7.5d10.7d9.1d4.9d2.9d1.3d0.2d
Mixed 0.1d0.2d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.2d0.1d
Snow 0.2d0.2d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.1d0.2d
Any 0.3d0.6d1.3d2.9d4.5d7.5d10.7d9.1d4.9d2.9d1.6d0.5d

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. Tanggu experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.9 months, from April 5 to November 1, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Tanggu is July, with an average rainfall of 5.3 inches.

The rainless period of the year lasts for 5.1 months, from November 1 to April 5. The month with the least rain in Tanggu is January, with an average rainfall of 0.0 inches.

Average Monthly Rainfall in Tanggu

Average Monthly Rainfall in TanggurainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inJul 235.5 inJul 235.5 inJan 120.0 inJan 120.0 inApr 50.5 inApr 50.5 inNov 10.5 inNov 10.5 in
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 0.0″0.1″0.2″0.7″1.3″2.8″5.3″4.2″1.7″0.7″0.3″0.0″

The length of the day in Tanggu varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 26 minutes of daylight; the longest day is June 21, with 14 hours, 55 minutes of daylight.

Hours of Daylight and Twilight in Tanggu

Hours of Daylight and Twilight in TangguJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2014 hr, 55 minJun 2114 hr, 55 minJun 2112 hr, 9 minSep 2212 hr, 9 minSep 229 hr, 26 minDec 219 hr, 26 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 9.8h10.7h12.0h13.2h14.3h14.9h14.6h13.6h12.4h11.2h10.1h9.5h

The earliest sunrise is at 4:43 AM on June 14, and the latest sunrise is 2 hours, 46 minutes later at 7:28 AM on January 5. The earliest sunset is at 4:46 PM on December 6, and the latest sunset is 2 hours, 52 minutes later at 7:39 PM on June 27.

Daylight saving time (DST) is not observed in Tanggu during 2024.

Sunrise & Sunset with Twilight in Tanggu

Sunrise & Sunset with Twilight in TangguJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 144:43 AMJun 144:43 AM7:39 PMJun 277:39 PMJun 27Dec 64:46 PMDec 64:46 PM7:28 AMJan 57:28 AMJan 5daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 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 Tanggu

Solar Elevation and Azimuth in TangguJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM00001010101020202020303030304040405050606070000010101010202020203030304040505060702874NowNow
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 Tanggu

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.

Tanggu experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.5 months, from June 2 to September 17, during which time the comfort level is muggy, oppressive, or miserable at least 23% of the time. The month with the most muggy days in Tanggu is July, with 27.6 days that are muggy or worse.

The least muggy day of the year is February 17, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Tanggu

Humidity Comfort Levels in TanggumuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 170%Feb 170%93%Jul 2693%Jul 26Jun 223%Jun 223%Sep 1723%Sep 1723%NowNowmiserablemiserableoppressiveoppressivedrydrymuggymuggycomfortablecomfortable
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 0.0d0.0d0.0d0.1d2.2d14.9d27.6d24.4d8.4d0.7d0.0d0.0d

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

The windier part of the year lasts for 8.0 months, from October 6 to June 8, with average wind speeds of more than 9.2 miles per hour. The windiest month of the year in Tanggu is April, with an average hourly wind speed of 11.1 miles per hour.

The calmer time of year lasts for 4.0 months, from June 8 to October 6. The calmest month of the year in Tanggu is August, with an average hourly wind speed of 7.2 miles per hour.

Average Wind Speed in Tanggu

Average Wind Speed in TangguwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphApr 2611.3 mphApr 2611.3 mphAug 157.1 mphAug 157.1 mphOct 69.2 mphOct 69.2 mphJun 89.2 mphJun 89.2 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) 9.39.410.211.110.58.97.87.28.29.59.99.7

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

The wind is most often from the south for 8.1 months, from February 16 to October 20, with a peak percentage of 46% on July 7. The wind is most often from the west for 1.9 months, from October 20 to December 17, with a peak percentage of 39% on December 10. The wind is most often from the north for 2.0 months, from December 17 to February 16, with a peak percentage of 36% on January 1.

Wind Direction in Tanggu

Wind Direction in TangguNSWNJanFebMarAprMayJunJulAugSepOctNovDec0%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).

Tanggu 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 extreme seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.5 months, from June 18 to October 1, with an average temperature above 69°F. The month of the year in Tanggu with the warmest water is August, with an average temperature of 77°F.

The time of year with cooler water lasts for 3.5 months, from December 18 to April 2, with an average temperature below 43°F. The month of the year in Tanggu with the coolest water is February, with an average temperature of 35°F.

Average Water Temperature in Tanggu

Average Water Temperature in TangguwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°FAug 978°FAug 978°F35°FFeb 1035°FFeb 10Jun 1869°FJun 1869°FOct 169°FOct 169°FDec 1843°FDec 1843°FApr 243°FApr 243°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 37°F35°F39°F48°F59°F68°F75°F77°F73°F64°F54°F44°F

To characterize how pleasant the weather is in Tanggu 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 Tanggu for general outdoor tourist activities are from mid May to late June and from mid August to late September, with a peak score in the second week of September.

Tourism Score in Tanggu

Tourism Score in Tanggubest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.67.60.00.07.47.45.85.8NowNowtemperaturetemperature 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 Tanggu for hot-weather activities is from late June to early September, with a peak score in the second week of August.

Beach/Pool Score in Tanggu

Beach/Pool Score in Tanggubest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.96.90.00.0NowNowtemperaturetemperature 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 Tanggu typically lasts for 7.9 months (242 days), from around March 17 to around November 14, rarely starting before March 2 or after April 2, and rarely ending before October 30 or after November 29.

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

Time Spent in Various Temperature Bands and the Growing Season in Tanggugrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 1750%Mar 1750%Nov 1450%Nov 1490%Apr 290%Apr 290%Oct 3090%Oct 3010%Mar 210%Mar 210%Nov 2910%Nov 290%Dec 230%Dec 23Jul 13100%Jul 13100%NowNowfreezingvery 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 Tanggu should appear around April 8, only rarely appearing before March 31 or after April 19.

Growing Degree Days in Tanggu

Growing Degree Days in TangguJanFebMarAprMayJunJulAugSepOctNovDec0°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°FApr 887°FApr 887°FJun 4900°FJun 4900°FJul 101,800°FJul 101,800°FDec 314,216°FDec 314,216°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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 3.6 months, from April 11 to July 31, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest month of the year in Tanggu is June, with an average of 6.5 kWh.

The darker period of the year lasts for 3.1 months, from October 31 to February 4, with an average daily incident shortwave energy per square meter below 3.2 kWh. The darkest month of the year in Tanggu is December, with an average of 2.4 kWh.

Average Daily Incident Shortwave Solar Energy in Tanggu

Average Daily Incident Shortwave Solar Energy in TanggubrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhMay 306.7 kWhMay 306.7 kWhDec 182.3 kWhDec 182.3 kWhApr 115.8 kWhApr 115.8 kWhJul 315.8 kWhJul 315.8 kWhOct 313.2 kWhOct 313.2 kWhFeb 43.2 kWhFeb 43.2 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) 2.73.54.75.96.46.56.05.54.83.72.82.4

For the purposes of this report, the geographical coordinates of Tanggu are 39.021 deg latitude, 117.647 deg longitude, and 20 ft elevation.

The topography within 2 miles of Tanggu contains only modest variations in elevation, with a maximum elevation change of 125 feet and an average elevation above sea level of 12 feet. Within 10 miles also contains only modest variations in elevation (269 feet). Within 50 miles also contains only modest variations in elevation (374 feet).

The area within 2 miles of Tanggu is covered by artificial surfaces (82%) and water (11%), within 10 miles by water (41%) and artificial surfaces (35%), and within 50 miles by water (44%) and cropland (36%).

This report illustrates the typical weather in Tanggu, 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 is only a single weather station, Tianjin Binhai International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Tanggu.

At a distance of 28 kilometers from Tanggu, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

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

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

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.