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Climate and Average Weather Year Round in Sunan North Korea

In Sunan, the summers are long, warm, humid, wet, and partly cloudy and the winters are short, freezing, snowy, and mostly clear. Over the course of the year, the temperature typically varies from 13°F to 84°F and is rarely below 3°F or above 90°F.

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

Climate in Sunan

freezingvery coldcoldcoolwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow71%71%49%49%clearovercastprecipitation: 10.5 inprecipitation: 10.5 in0.2 in0.2 inmuggy: 92%muggy: 92%0%0%drydrytourism score: 6.9tourism score: 6.90.00.0
Sunan weather by month. Click on each chart for more information.

The warm season lasts for 4.2 months, from May 18 to September 25, with an average daily high temperature above 73°F. The hottest month of the year in Sunan is August, with an average high of 83°F and low of 70°F.

The cold season lasts for 2.9 months, from November 29 to February 26, with an average daily high temperature below 39°F. The coldest month of the year in Sunan is January, with an average low of 14°F and high of 29°F.

Average High and Low Temperature in Sunan

Average High and Low Temperature in SunanwarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 1828°FJan 1828°FAug 384°FAug 384°F13°F13°F72°F72°FMay 1873°FMay 1873°FSep 2573°FSep 2573°FNov 2939°FNov 2939°FFeb 2639°FFeb 2639°F55°F55°F56°F56°F26°F26°F24°F24°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 29°F36°F48°F62°F72°F79°F82°F83°F76°F63°F47°F33°F
Temp. 21°F28°F39°F52°F63°F71°F76°F76°F67°F54°F40°F26°F
Low 14°F21°F32°F44°F55°F64°F70°F70°F59°F46°F33°F20°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 Sunan

Average Hourly Temperature in SunanJanFebMarAprMayJunJulAugSepOctNovDec12 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 AMNowNowfreezingfreezingcoldcoldcoolcoolcomfortablewarmvery 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.

Norwalk, Iowa, United States (6,345 miles away) is the far-away foreign place with temperatures most similar to Sunan (view comparison).

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Compare Sunan to another city:

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In Sunan, 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 Sunan begins around September 2 and lasts for 6.2 months, ending around March 8.

The clearest month of the year in Sunan is January, during which on average the sky is clear, mostly clear, or partly cloudy 70% of the time.

The cloudier part of the year begins around March 8 and lasts for 5.8 months, ending around September 2.

The cloudiest month of the year in Sunan is July, during which on average the sky is overcast or mostly cloudy 49% of the time.

Cloud Cover Categories in Sunan

Cloud Cover Categories in SunanclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jan 2271%Jan 2271%Jul 2149%Jul 2149%Sep 260%Sep 260%Mar 860%Mar 860%NowNowclearpartly cloudyovercastmostly cloudymostly clear
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 30%33%40%44%44%45%49%44%36%30%34%32%
Clearer 70%67%60%56%56%55%51%56%64%70%66%68%

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

The wetter season lasts 2.7 months, from June 15 to September 5, with a greater than 28% chance of a given day being a wet day. The month with the most wet days in Sunan is July, with an average of 15.1 days with at least 0.04 inches of precipitation.

The drier season lasts 9.3 months, from September 5 to June 15. The month with the fewest wet days in Sunan is January, with an average of 1.5 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 Sunan changes throughout the year.

Rain alone is the most common for 11 months, from January 27 to December 21. The month with the most days of rain alone in Sunan is July, with an average of 15.1 days.

Snow alone is the most common for 1.2 months, from December 21 to January 27. The month with the most days of snow alone in Sunan is December, with an average of 0.8 days.

Daily Chance of Precipitation in Sunan

Daily Chance of Precipitation in SunansnowrainJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 2553%Jul 2553%Jan 283%Jan 283%Dec 217%Dec 217%Jun 1528%Jun 1528%Sep 528%Sep 528%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 0.5d1.3d2.8d4.7d6.8d8.7d15.1d12.4d6.9d4.9d4.3d1.4d
Mixed 0.2d0.2d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.2d0.3d
Snow 0.8d0.3d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.2d0.8d
Any 1.5d1.8d3.0d4.8d6.8d8.7d15.1d12.4d6.9d4.9d4.7d2.5d

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. Sunan experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.7 months, from February 17 to December 7, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Sunan is July, with an average rainfall of 9.9 inches.

The rainless period of the year lasts for 2.4 months, from December 7 to February 17. The month with the least rain in Sunan is January, with an average rainfall of 0.1 inches.

Average Monthly Rainfall in Sunan

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 0.1″0.5″0.9″1.8″2.5″3.9″9.9″7.6″3.2″1.6″1.2″0.3″

Snowfall

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

The snowy period of the year lasts for 1.1 months, from December 13 to January 16, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Sunan is December, with an average snowfall of 1.1 inches.

The snowless period of the year lasts for 11 months, from January 16 to December 13. The least snow falls around July 9, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Sunan

Average Monthly Snowfall in SunanJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inDec 301.3 inDec 301.3 inJul 90.0 inJul 90.0 inJan 161.0 inJan 161.0 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 1.0″0.6″0.2″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.3″1.1″

The length of the day in Sunan varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 25 minutes of daylight; the longest day is June 21, with 14 hours, 56 minutes of daylight.

Hours of Daylight and Twilight in Sunan

Hours of Daylight and Twilight in SunanJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 9 minMar 2012 hr, 9 minMar 2014 hr, 56 minJun 2114 hr, 56 minJun 2112 hr, 9 minSep 2212 hr, 9 minSep 229 hr, 25 minDec 219 hr, 25 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 9.8h10.7h12.0h13.3h14.3h14.9h14.6h13.7h12.4h11.2h10.0h9.5h

The earliest sunrise is at 5:10 AM on June 14, and the latest sunrise is 2 hours, 47 minutes later at 7:56 AM on January 6. The earliest sunset is at 5:14 PM on December 8, and the latest sunset is 2 hours, 54 minutes later at 8:07 PM on June 28.

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

Sunrise & Sunset with Twilight in Sunan

Sunrise & Sunset with Twilight in SunanJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 145:10 AMJun 145:10 AM8:07 PMJun 288:07 PMJun 28Dec 85:14 PMDec 85:14 PM7:56 AMJan 67:56 AMJan 6daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
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 Sunan

Solar Elevation and Azimuth in SunanJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM00001010101020202020303030304040405050606070000010101010202020203030304040505060702774NowNow
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 Sunan

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.

Sunan experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.0 months, from June 15 to September 13, 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 Sunan is July, with 25.3 days that are muggy or worse.

The least muggy day of the year is February 18, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Sunan

Humidity Comfort Levels in SunanmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 180%Feb 180%92%Aug 292%Aug 2Jun 1523%Jun 1523%Sep 1323%Sep 1323%NowNowoppressiveoppressivedrydrymuggymuggymiserablemiserablecomfortablecomfortable
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 0.0d0.0d0.0d0.0d0.3d8.1d25.3d24.2d6.3d0.1d0.0d0.0d

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

The windier part of the year lasts for 7.1 months, from October 20 to May 24, with average wind speeds of more than 8.0 miles per hour. The windiest month of the year in Sunan is April, with an average hourly wind speed of 9.2 miles per hour.

The calmer time of year lasts for 4.9 months, from May 24 to October 20. The calmest month of the year in Sunan is September, with an average hourly wind speed of 6.7 miles per hour.

Average Wind Speed in Sunan

Average Wind Speed in SunanwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphApr 209.3 mphApr 209.3 mphAug 246.6 mphAug 246.6 mphOct 208.0 mphOct 208.0 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 8.58.99.19.28.47.17.46.86.77.88.68.7

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

The wind is most often from the west for 3.7 months, from March 14 to July 4, with a peak percentage of 37% on May 28. The wind is most often from the east for 1.7 months, from August 4 to September 26, with a peak percentage of 39% on August 30. The wind is most often from the north for 5.6 months, from September 26 to March 14, with a peak percentage of 52% on January 1.

Wind Direction in Sunan

Wind Direction in SunanNWSENJanFebMarAprMayJunJulAugSepOctNovDec0%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).

Sunan 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 25 to October 10, with an average temperature above 67°F. The month of the year in Sunan with the warmest water is August, with an average temperature of 75°F.

The time of year with cooler water lasts for 3.2 months, from December 30 to April 5, with an average temperature below 41°F. The month of the year in Sunan with the coolest water is February, with an average temperature of 33°F.

Average Water Temperature in Sunan

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 37°F33°F36°F44°F54°F64°F71°F75°F72°F65°F55°F46°F

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

Tourism Score in Sunan

Tourism Score in Sunanbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.96.90.00.06.96.95.85.8NowNow 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 Sunan for hot-weather activities is from early July to late August, with a peak score in the second week of August.

Beach/Pool Score in Sunan

Beach/Pool Score in Sunanbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.85.80.00.0NowNowtemperaturetemperature 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 Sunan typically lasts for 6.9 months (211 days), from around April 1 to around October 29, rarely starting before March 18 or after April 15, and rarely ending before October 13 or after November 14.

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

Time Spent in Various Temperature Bands and the Growing Season in Sunangrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 150%Apr 150%Oct 2950%Oct 2990%Apr 1590%Apr 1590%Oct 1390%Oct 1310%Mar 1810%Mar 1810%Nov 1410%Nov 140%Dec 170%Dec 17Jul 13100%Jul 13100%frigidfreezingvery coldcoolcomfortablewarmhotcold
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 Sunan should appear around April 19, only rarely appearing before April 10 or after April 27.

Growing Degree Days in Sunan

Growing Degree Days in SunanJanFebMarAprMayJunJulAugSepOctNovDec0°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 1989°FApr 1989°FJun 17900°FJun 17900°FJul 241,800°FJul 241,800°FDec 313,541°FDec 313,541°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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 3.1 months, from April 19 to July 22, with an average daily incident shortwave energy per square meter above 5.7 kWh. The brightest month of the year in Sunan is June, with an average of 6.4 kWh.

The darker period of the year lasts for 3.0 months, from November 2 to February 1, with an average daily incident shortwave energy per square meter below 3.1 kWh. The darkest month of the year in Sunan is December, with an average of 2.2 kWh.

Average Daily Incident Shortwave Solar Energy in Sunan

Average Daily Incident Shortwave Solar Energy in SunanbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhMay 306.5 kWhMay 306.5 kWhDec 182.2 kWhDec 182.2 kWhApr 195.7 kWhApr 195.7 kWhJul 225.7 kWhJul 225.7 kWhNov 23.1 kWhNov 23.1 kWhFeb 13.1 kWhFeb 13.1 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) 2.63.54.65.66.36.45.85.44.83.82.62.2

For the purposes of this report, the geographical coordinates of Sunan are 39.198 deg latitude, 125.690 deg longitude, and 112 ft elevation.

The topography within 2 miles of Sunan contains only modest variations in elevation, with a maximum elevation change of 217 feet and an average elevation above sea level of 111 feet. Within 10 miles contains only modest variations in elevation (1,804 feet). Within 50 miles contains very significant variations in elevation (4,131 feet).

The area within 2 miles of Sunan is covered by sparse vegetation (44%), cropland (36%), and bare soil (14%), within 10 miles by cropland (38%) and sparse vegetation (33%), and within 50 miles by cropland (26%) and water (23%).

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

At a distance of 3 kilometers from Sunan, 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 Sunan 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.