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  2. Tajikistan
  3. Viloyati Sughd

Climate and Average Weather Year Round at Khudjand International Airport Tajikistan

At Khudjand International Airport, the summers are hot, arid, and clear and the winters are very cold, snowy, and partly cloudy. Over the course of the year, the temperature typically varies from 29°F to 96°F and is rarely below 17°F or above 102°F.

Based on the beach/pool score, the best time of year to visit Khudjand International Airport for hot-weather activities is from mid June to late August.

Climate at Khudjand International Airport

very coldcoldcoolwarmhothotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow97%97%38%38%clearovercastprecipitation: 0.8 inprecipitation: 0.8 in0.1 in0.1 inmuggy: 1%muggy: 1%0%0%drydrybeach/pool score: 8.6beach/pool score: 8.60.00.0
Khudjand International Airport weather by month. Click on each chart for more information.

The hot season lasts for 3.7 months, from May 21 to September 12, with an average daily high temperature above 85°F. The hottest month of the year at Khudjand International Airport is July, with an average high of 95°F and low of 70°F.

The cold season lasts for 3.4 months, from November 21 to March 3, with an average daily high temperature below 51°F. The coldest month of the year at Khudjand International Airport is January, with an average low of 29°F and high of 40°F.

Average High and Low Temperature at Khudjand International Airport

Average High and Low Temperature at Khudjand International AirporthotcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FJan 1740°FJan 1740°FJul 396°FJul 396°F29°F29°F70°F70°FMay 2185°FMay 2185°FSep 1285°FSep 1285°FNov 2151°FNov 2151°FMar 351°FMar 351°F61°F61°F59°F59°F37°F37°F36°F36°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 40°F45°F57°F72°F83°F93°F95°F92°F83°F69°F54°F44°F
Temp. 34°F38°F48°F61°F71°F80°F83°F80°F70°F58°F46°F37°F
Low 29°F31°F40°F51°F60°F67°F70°F66°F58°F47°F38°F31°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 at Khudjand International Airport

Average Hourly Temperature at Khudjand International AirportJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldcoldcoldcoolcoolcomfortablewarmwarmhotfreezing
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.

LeChee, Arizona, United States (7,119 miles away); Wichita, Kansas, United States (6,999 miles); and Oran, Missouri, United States (6,945 miles) are the far-away foreign places with temperatures most similar to Khudjand International Airport (view comparison).

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At Khudjand International Airport, 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 at Khudjand International Airport begins around May 20 and lasts for 4.9 months, ending around October 17.

The clearest month of the year at Khudjand International Airport is August, during which on average the sky is clear, mostly clear, or partly cloudy 97% of the time.

The cloudier part of the year begins around October 17 and lasts for 7.1 months, ending around May 20.

The cloudiest month of the year at Khudjand International Airport is February, during which on average the sky is overcast or mostly cloudy 60% of the time.

Cloud Cover Categories at Khudjand International Airport

Cloud Cover Categories at Khudjand International AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 1297%Aug 1297%Feb 838%Feb 838%May 2068%May 2068%Oct 1769%Oct 1769%NowNowclearovercastpartly 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 59%60%59%49%35%13%4%3%9%31%48%55%
Clearer 41%40%41%51%65%87%96%97%91%69%52%45%

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

The wetter season lasts 7.3 months, from October 17 to May 27, with a greater than 8% chance of a given day being a wet day. The month with the most wet days at Khudjand International Airport is March, with an average of 4.7 days with at least 0.04 inches of precipitation.

The drier season lasts 4.7 months, from May 27 to October 17. The month with the fewest wet days at Khudjand International Airport is August, 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. The month with the most days of rain alone at Khudjand International Airport is April, with an average of 4.2 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 16% on March 31.

Daily Chance of Precipitation at Khudjand International Airport

Daily Chance of Precipitation at Khudjand International AirportwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Mar 1916%Mar 1916%Aug 241%Aug 241%Oct 178%Oct 178%May 278%May 278%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 2.0d2.7d4.2d4.2d3.5d1.2d0.7d0.3d0.7d2.3d2.7d2.6d
Mixed 0.6d0.5d0.4d0.0d0.0d0.0d0.0d0.0d0.0d0.1d0.3d0.4d
Snow 0.4d0.5d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.2d0.4d
Any 3.0d3.8d4.7d4.2d3.5d1.2d0.7d0.3d0.7d2.4d3.2d3.3d

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. Khudjand International Airport experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 3.3 months, from February 15 to May 24, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain at Khudjand International Airport is April, with an average rainfall of 0.7 inches.

The rainless period of the year lasts for 8.7 months, from May 24 to February 15. The month with the least rain at Khudjand International Airport is August, with an average rainfall of 0.1 inches.

Average Monthly Rainfall at Khudjand International Airport

Average Monthly Rainfall at Khudjand International AirportrainJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 inApr 10.8 inApr 10.8 inAug 220.1 inAug 220.1 inNov 120.5 inNov 120.5 inJan 170.3 inJan 170.3 inMay 240.5 inMay 240.5 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 0.3″0.5″0.7″0.7″0.6″0.2″0.1″0.1″0.1″0.4″0.5″0.5″

Snowfall

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

The snowy period of the year lasts for 1.0 months, from January 19 to February 20, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow at Khudjand International Airport is February, with an average snowfall of 1.1 inches.

The snowless period of the year lasts for 11 months, from February 20 to January 19. The least snow falls around July 7, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall at Khudjand International Airport

Average Monthly Snowfall at Khudjand International AirportsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 inFeb 31.2 inFeb 31.2 inJul 70.0 inJul 70.0 inDec 50.8 inDec 50.8 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 0.9″1.1″0.4″0.0″0.0″0.0″0.0″0.0″0.0″0.1″0.6″0.7″

The length of the day at Khudjand International Airport varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 18 minutes of daylight; the longest day is June 21, with 15 hours, 2 minutes of daylight.

Hours of Daylight and Twilight at Khudjand International Airport

Hours of Daylight and Twilight at Khudjand International AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2015 hr, 2 minJun 2115 hr, 2 minJun 2112 hr, 9 minSep 2212 hr, 9 minSep 229 hr, 18 minDec 219 hr, 18 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 9.7h10.7h12.0h13.3h14.4h15.0h14.7h13.7h12.4h11.1h10.0h9.4h

The earliest sunrise is at 4:51 AM on June 14, and the latest sunrise is 2 hours, 53 minutes later at 7:43 AM on January 4. The earliest sunset is at 4:55 PM on December 8, and the latest sunset is 3 hours, 0 minutes later at 7:54 PM on June 27.

Daylight saving time (DST) is not observed at Khudjand International Airport during 2024.

Sunrise & Sunset with Twilight at Khudjand International Airport

Sunrise & Sunset with Twilight at Khudjand International AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 144:51 AMJun 144:51 AM7:54 PMJun 277:54 PMJun 27Dec 84:55 PMDec 84:55 PM7:43 AMJan 47:43 AMJan 4daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
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 at Khudjand International Airport

Solar Elevation and Azimuth at Khudjand International AirportJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM000010101010202020203030303040404050506060700000101010102020202030303040405050602673NowNow
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 at Khudjand International Airport

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The perceived humidity level at Khudjand International Airport, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

Humidity Comfort Levels at Khudjand International Airport

Humidity Comfort Levels at Khudjand International AirportJanFebMarAprMayJunJulAugSepOctNovDec0%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%Jul 101%Jul 101%comfortablecomfortabledrydryhumidhumid
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 0.0d0.0d0.0d0.0d0.1d0.1d0.2d0.1d0.0d0.0d0.0d0.0d

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed at Khudjand International Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.0 months, from March 18 to September 19, with average wind speeds of more than 6.4 miles per hour. The windiest month of the year at Khudjand International Airport is July, with an average hourly wind speed of 7.6 miles per hour.

The calmer time of year lasts for 6.0 months, from September 19 to March 18. The calmest month of the year at Khudjand International Airport is December, with an average hourly wind speed of 5.2 miles per hour.

Average Wind Speed at Khudjand International Airport

Average Wind Speed at Khudjand International AirportwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphJul 237.6 mphJul 237.6 mphDec 215.1 mphDec 215.1 mphMar 186.4 mphMar 186.4 mphSep 196.4 mphSep 196.4 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) 5.35.86.36.66.77.17.67.26.55.75.25.2

The predominant average hourly wind direction at Khudjand International Airport is from the west throughout the year.

Wind Direction at Khudjand International Airport

Wind Direction at Khudjand International AirportJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwesteastsouthnorth
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 at Khudjand International Airport 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 Khudjand International Airport for general outdoor tourist activities is from mid August to late September, with a peak score in the first week of September.

Tourism Score at Khudjand International Airport

Tourism Score at Khudjand International Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810108.38.30.00.07.47.46.96.9NowNowtemperaturetemperature 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 Khudjand International Airport for hot-weather activities is from mid June to late August, with a peak score in the last week of July.

Beach/Pool Score at Khudjand International Airport

Beach/Pool Score at Khudjand International Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810108.68.60.00.0NowNow 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 at Khudjand International Airport typically lasts for 8.0 months (244 days), from around March 13 to around November 11, rarely starting before February 18 or after April 7, and rarely ending before October 17 or after December 8.

Time Spent in Various Temperature Bands and the Growing Season at Khudjand International Airport

Time Spent in Various Temperature Bands and the Growing Season at Khudjand International Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 1350%Mar 1350%Nov 1150%Nov 1190%Apr 790%Apr 790%Oct 1790%Oct 1710%Feb 1810%Feb 1810%Dec 810%Dec 80%Jan 140%Jan 14Jul 20100%Jul 20100%freezingvery 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 at Khudjand International Airport should appear around March 25, only rarely appearing before March 14 or after April 4.

Growing Degree Days at Khudjand International Airport

Growing Degree Days at Khudjand International AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°FMar 2586°FMar 2586°FMay 22900°FMay 22900°FJun 251,800°FJun 251,800°FDec 314,730°FDec 314,730°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 extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.2 months, from May 18 to August 26, with an average daily incident shortwave energy per square meter above 7.0 kWh. The brightest month of the year at Khudjand International Airport is July, with an average of 8.1 kWh.

The darker period of the year lasts for 3.7 months, from October 30 to February 20, with an average daily incident shortwave energy per square meter below 3.3 kWh. The darkest month of the year at Khudjand International Airport is December, with an average of 2.0 kWh.

Average Daily Incident Shortwave Solar Energy at Khudjand International Airport

Average Daily Incident Shortwave Solar Energy at Khudjand International AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhJun 308.3 kWhJun 308.3 kWhDec 192.0 kWhDec 192.0 kWhMay 187.0 kWhMay 187.0 kWhAug 267.0 kWhAug 267.0 kWhOct 303.3 kWhOct 303.3 kWhFeb 203.3 kWhFeb 203.3 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) 2.33.14.35.76.98.08.17.46.04.12.62.0

For the purposes of this report, the geographical coordinates of Khudjand International Airport are 40.215 deg latitude, 69.695 deg longitude, and 1,430 ft elevation.

The topography within 2 miles of Khudjand International Airport contains only modest variations in elevation, with a maximum elevation change of 322 feet and an average elevation above sea level of 1,436 feet. Within 10 miles contains only modest variations in elevation (3,212 feet). Within 50 miles contains large variations in elevation (16,683 feet).

The area within 2 miles of Khudjand International Airport is covered by cropland (80%) and bare soil (19%), within 10 miles by cropland (52%) and bare soil (31%), and within 50 miles by bare soil (46%) and cropland (21%).

This report illustrates the typical weather at Khudjand International Airport, 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

Khudjand International Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back are Tashkent International Airport, Dzizak, Namangan Airport, and Fergana International Airport.

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.