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Climate and Average Weather Year Round in Baiyun China

In Baiyun, the summers are short, hot, oppressive, wet, and overcast and the winters are cold and partly cloudy. Over the course of the year, the temperature typically varies from 35°F to 92°F and is rarely below 24°F or above 100°F.

Based on the tourism score, the best time of year to visit Baiyun for warm-weather activities is from late August to mid October.

Climate in Baiyun

coldcoolwarmhotwarmcoolJanFebMarAprMayJunJulAugSepOctNovDecNowNow73%73%21%21%overcastprecipitation: 7.6 inprecipitation: 7.6 in1.2 in1.2 inmuggy: 96%muggy: 96%0%0%drydrytourism score: 6.4tourism score: 6.40.50.5
Baiyun weather by month. Click on each chart for more information.

The hot season lasts for 2.9 months, from June 12 to September 10, with an average daily high temperature above 84°F. The hottest month of the year in Baiyun is July, with an average high of 92°F and low of 71°F.

The cool season lasts for 3.3 months, from November 30 to March 7, with an average daily high temperature below 62°F. The coldest month of the year in Baiyun is January, with an average low of 35°F and high of 55°F.

Average High and Low Temperature in Baiyun

Average High and Low Temperature in BaiyunhotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2354°FJan 2354°FJul 1392°FJul 1392°F35°F35°F71°F71°FJun 1284°FJun 1284°FSep 1084°FSep 1084°FNov 3062°FNov 3062°FMar 762°FMar 762°F66°F66°F66°F66°F42°F42°F42°F42°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 55°F57°F64°F73°F79°F86°F92°F90°F83°F75°F66°F58°F
Temp. 43°F46°F52°F61°F68°F75°F80°F78°F72°F64°F55°F46°F
Low 35°F38°F44°F52°F60°F67°F71°F70°F64°F56°F47°F38°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 Baiyun

Average Hourly Temperature in BaiyunJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldcoldcoldcoldcoolcoolcomfortablewarmhotvery coldvery cold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Clinton, North Carolina, United States (8,081 miles away) is the far-away foreign place with temperatures most similar to Baiyun (view comparison).

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

The clearer part of the year in Baiyun begins around September 16 and lasts for 6.2 months, ending around March 23.

The clearest month of the year in Baiyun is December, during which on average the sky is clear, mostly clear, or partly cloudy 71% of the time.

The cloudier part of the year begins around March 23 and lasts for 5.8 months, ending around September 16.

The cloudiest month of the year in Baiyun is June, during which on average the sky is overcast or mostly cloudy 78% of the time.

Cloud Cover Categories in Baiyun

Cloud Cover Categories in BaiyunclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Dec 473%Dec 473%Jun 2021%Jun 2021%Sep 1646%Sep 1646%Mar 2347%Mar 2347%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 36%43%50%60%68%78%75%69%53%33%31%29%
Clearer 64%57%50%40%32%22%25%31%47%67%69%71%

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

The wetter season lasts 6.7 months, from February 23 to September 15, with a greater than 30% chance of a given day being a wet day. The month with the most wet days in Baiyun is May, with an average of 14.3 days with at least 0.04 inches of precipitation.

The drier season lasts 5.3 months, from September 15 to February 23. The month with the fewest wet days in Baiyun is December, with an average of 3.6 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 Baiyun is May, with an average of 14.3 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 50% on June 9.

Daily Chance of Precipitation in Baiyun

Daily Chance of Precipitation in BaiyunwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 950%Jun 950%Dec 1711%Dec 1711%Feb 2330%Feb 2330%Sep 1530%Sep 1530%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 4.1d6.5d11.5d12.8d14.3d13.3d10.0d11.6d8.7d4.2d4.1d3.3d
Mixed 0.5d0.9d0.5d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.2d
Snow 0.2d0.2d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.1d
Any 4.8d7.6d12.0d12.8d14.3d13.3d10.0d11.6d8.7d4.2d4.2d3.6d

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. Baiyun experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Baiyun. The month with the most rain in Baiyun is June, with an average rainfall of 7.3 inches.

The month with the least rain in Baiyun is December, with an average rainfall of 1.2 inches.

Average Monthly Rainfall in Baiyun

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 1.5″2.7″4.5″5.6″6.9″7.3″4.9″6.1″4.8″1.7″1.8″1.2″

Snowfall

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

The snowy period of the year lasts for 2.1 months, from January 4 to March 7, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Baiyun is February, with an average snowfall of 1.8 inches.

The snowless period of the year lasts for 9.9 months, from March 7 to January 4. The least snow falls around August 5, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Baiyun

Average Monthly Snowfall in BaiyunsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 inFeb 91.9 inFeb 91.9 inAug 50.0 inAug 50.0 inJan 41.0 inJan 41.0 inMar 71.0 inMar 71.0 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 1.3″1.8″0.6″0.1″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.5″

The length of the day in Baiyun varies over the course of the year. In 2024, the shortest day is December 21, with 10 hours, 31 minutes of daylight; the longest day is June 21, with 13 hours, 46 minutes of daylight.

Hours of Daylight and Twilight in Baiyun

Hours of Daylight and Twilight in BaiyunJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2013 hr, 46 minJun 2113 hr, 46 minJun 2112 hr, 8 minSep 2212 hr, 8 minSep 2210 hr, 31 minDec 2110 hr, 31 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 10.7h11.3h12.0h12.8h13.4h13.7h13.6h13.0h12.3h11.5h10.9h10.5h

The earliest sunrise is at 5:11 AM on June 10, and the latest sunrise is 1 hour, 41 minutes later at 6:53 AM on January 13. The earliest sunset is at 5:12 PM on November 30, and the latest sunset is 1 hour, 48 minutes later at 7:00 PM on July 2.

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

Sunrise & Sunset with Twilight in Baiyun

Sunrise & Sunset with Twilight in BaiyunJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 105:11 AMJun 105:11 AM7:00 PMJul 27:00 PMJul 2Nov 305:12 PMNov 305:12 PM6:53 AMJan 136:53 AMJan 13daynightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 Baiyun

Solar Elevation and Azimuth in BaiyunJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM000010101010202020203030303040404040505050606070708000001010101020202020303030304040404050505060606070708041NowNow
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 Baiyun

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.

Baiyun experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 5.2 months, from April 30 to October 3, during which time the comfort level is muggy, oppressive, or miserable at least 24% of the time. The month with the most muggy days in Baiyun is July, with 29.6 days that are muggy or worse.

The month with the fewest muggy days in Baiyun is January, with 0.0 days that are muggy or worse.

Humidity Comfort Levels in Baiyun

Humidity Comfort Levels in BaiyunmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 160%Jan 160%96%Jul 1196%Jul 11Apr 3024%Apr 3024%Oct 324%Oct 324%NowNowoppressiveoppressivemuggymuggydrydryhumidhumidmiserablemiserable
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 0.0d0.1d0.7d4.0d11.8d23.4d29.6d28.6d16.6d4.1d0.7d0.0d

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 Baiyun does not vary significantly over the course of the year, remaining within 0.5 miles per hour of 4.4 miles per hour throughout.

Average Wind Speed in Baiyun

Average Wind Speed in BaiyunJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mphOct 114.9 mphOct 114.9 mphMay 203.9 mphMay 203.9 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) 4.54.44.34.13.94.34.34.14.54.94.84.7

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

The wind is most often from the east for 3.8 months, from February 10 to June 5 and for 2.4 months, from August 16 to October 28, with a peak percentage of 56% on September 17. The wind is most often from the south for 2.4 months, from June 5 to August 16, with a peak percentage of 64% on July 4. The wind is most often from the north for 3.4 months, from October 28 to February 10, with a peak percentage of 60% on January 1.

Wind Direction in Baiyun

Wind Direction in BaiyunNESENJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowsoutheastnorthwest
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).

Baiyun is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 4.0 months, from June 11 to October 10, with an average temperature above 76°F. The month of the year in Baiyun with the warmest water is August, with an average temperature of 81°F.

The time of year with cooler water lasts for 3.4 months, from December 20 to March 31, with an average temperature below 61°F. The month of the year in Baiyun with the coolest water is February, with an average temperature of 57°F.

Average Water Temperature in Baiyun

Average Water Temperature in BaiyunwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°FAug 2581°FAug 2581°F56°FFeb 456°FFeb 4Jun 1176°FJun 1176°FOct 1076°FOct 1076°FDec 2061°FDec 2061°FMar 3161°FMar 3161°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 58°F57°F59°F64°F71°F77°F80°F81°F80°F75°F69°F62°F

To characterize how pleasant the weather is in Baiyun 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 Baiyun for general outdoor tourist activities is from late August to mid October, with a peak score in the last week of September.

Tourism Score in Baiyun

Tourism Score in Baiyunbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.46.40.50.54.84.8NowNowtemperaturetemperature 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 Baiyun for hot-weather activities is from early July to early September, with a peak score in the first week of August.

Beach/Pool Score in Baiyun

Beach/Pool Score in Baiyunbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.15.10.00.0NowNowtemperaturetemperature 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 Baiyun typically lasts for 8.6 months (262 days), from around March 11 to around November 28, rarely starting before February 19 or after April 2, and rarely ending before November 4 or after December 20.

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

Time Spent in Various Temperature Bands and the Growing Season in Baiyungrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 1150%Mar 1150%Nov 2850%Nov 2890%Apr 290%Apr 290%Nov 490%Nov 410%Feb 1910%Feb 1910%Dec 2010%Dec 200%Jan 200%Jan 20Jul 16100%Jul 16100%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 Baiyun should appear around February 16, only rarely appearing before February 4 or after March 5.

Growing Degree Days in Baiyun

Growing Degree Days in BaiyunJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°FFeb 1687°FFeb 1687°FMay 15900°FMay 15900°FJun 251,800°FJun 251,800°FDec 315,008°FDec 315,008°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 some seasonal variation over the course of the year.

The brighter period of the year lasts for 2.0 months, from June 17 to August 17, with an average daily incident shortwave energy per square meter above 5.4 kWh. The brightest month of the year in Baiyun is July, with an average of 5.8 kWh.

The darker period of the year lasts for 3.3 months, from November 10 to February 19, with an average daily incident shortwave energy per square meter below 3.9 kWh. The darkest month of the year in Baiyun is December, with an average of 3.5 kWh.

Average Daily Incident Shortwave Solar Energy in Baiyun

Average Daily Incident Shortwave Solar Energy in BaiyunbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhJul 95.9 kWhJul 95.9 kWhJan 83.4 kWhJan 83.4 kWhAug 175.4 kWhAug 175.4 kWhNov 103.9 kWhNov 103.9 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) 3.53.94.45.05.25.45.85.55.34.83.83.5

For the purposes of this report, the geographical coordinates of Baiyun are 26.036 deg latitude, 118.906 deg longitude, and 1,703 ft elevation.

The topography within 2 miles of Baiyun contains large variations in elevation, with a maximum elevation change of 2,280 feet and an average elevation above sea level of 2,045 feet. Within 10 miles contains large variations in elevation (3,970 feet). Within 50 miles also contains extreme variations in elevation (5,955 feet).

The area within 2 miles of Baiyun is covered by trees (68%) and grassland (20%), within 10 miles by trees (75%) and grassland (13%), and within 50 miles by trees (66%) and grassland (12%).

This report illustrates the typical weather in Baiyun, 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, Fuzhou Changle International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Baiyun.

At a distance of 77 kilometers from Baiyun, 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 Baiyun 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.