Climate and Average Weather Year Round in Osh Kyrgyzstan

In Osh, the summers are hot, arid, and mostly clear and the winters are very cold, snowy, and partly cloudy. Over the course of the year, the temperature typically varies from 22°F to 89°F and is rarely below 12°F or above 95°F.

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

The hot season lasts for 3.7 months, from May 24 to September 15, with an average daily high temperature above 78°F. The hottest month of the year in Osh is July, with an average high of 89°F and low of 65°F.

The cold season lasts for 3.3 months, from November 24 to March 3, with an average daily high temperature below 46°F. The coldest month of the year in Osh is January, with an average low of 23°F and high of 36°F.

In Osh, 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 Osh begins around May 29 and lasts for 4.5 months, ending around October 15.

The clearest month of the year in Osh is August, during which on average the sky is clear, mostly clear, or partly cloudy 94% of the time.

The cloudier part of the year begins around October 15 and lasts for 7.5 months, ending around May 29.

The cloudiest month of the year in Osh is February, during which on average the sky is overcast or mostly cloudy 67% of the time.

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

The wetter season lasts 7.8 months, from October 14 to June 6, with a greater than 9% chance of a given day being a wet day. The month with the most wet days in Osh is March, with an average of 4.7 days with at least 0.04 inches of precipitation.

The drier season lasts 4.2 months, from June 6 to October 14. The month with the fewest wet days in Osh is August, with an average of 0.7 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 Osh changes throughout the year.

Rain alone is the most common for 11 months, from February 8 to December 28. The month with the most days of rain alone in Osh is April, with an average of 4.4 days.

Snow alone is the most common for 1.4 months, from December 28 to February 8. The month with the most days of snow alone in Osh is January, with an average of 1.4 days.

Rainfall

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. Osh experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.6 months, from October 14 to June 2, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Osh is April, with an average rainfall of 0.9 inches.

The rainless period of the year lasts for 4.4 months, from June 2 to October 14. The month with the least rain in Osh is August, with an average rainfall of 0.1 inches.

Snowfall

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

The snowy period of the year lasts for 4.5 months, from November 6 to March 21, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Osh is February, with an average snowfall of 3.0 inches.

The snowless period of the year lasts for 7.5 months, from March 21 to November 6. The least snow falls around July 16, with an average total accumulation of 0.0 inches.

The length of the day in Osh varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 16 minutes of daylight; the longest day is June 21, with 15 hours, 5 minutes of daylight.

The earliest sunrise is at 5:37 AM on June 14, and the latest sunrise is 2 hours, 55 minutes later at 8:32 AM on January 5. The earliest sunset is at 5:41 PM on December 8, and the latest sunset is 3 hours, 2 minutes later at 8:43 PM on June 27.

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

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.

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 in Osh, 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, staying within 1% of 1% throughout.

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

The windier part of the year lasts for 5.6 months, from April 7 to September 25, with average wind speeds of more than 5.1 miles per hour. The windiest month of the year in Osh is July, with an average hourly wind speed of 6.2 miles per hour.

The calmer time of year lasts for 6.4 months, from September 25 to April 7. The calmest month of the year in Osh is December, with an average hourly wind speed of 4.1 miles per hour.

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

The wind is most often from the south for 2.6 months, from March 30 to June 18 and for 2.7 months, from August 11 to November 1, with a peak percentage of 42% on September 2. The wind is most often from the west for 1.8 months, from June 18 to August 11, with a peak percentage of 43% on July 21. The wind is most often from the east for 4.9 months, from November 1 to March 30, with a peak percentage of 39% on January 1.

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

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 Osh for hot-weather activities is from late June to mid August, with a peak score in the third week of July.

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 Osh typically lasts for 7.5 months (229 days), from around March 23 to around November 6, rarely starting before March 2 or after April 12, and rarely ending before October 16 or after November 26.

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 Osh should appear around April 6, only rarely appearing before March 29 or after April 16.

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 22 to August 28, with an average daily incident shortwave energy per square meter above 6.8 kWh. The brightest month of the year in Osh is July, with an average of 8.0 kWh.

The darker period of the year lasts for 3.7 months, from October 31 to February 20, with an average daily incident shortwave energy per square meter below 3.2 kWh. The darkest month of the year in Osh is December, with an average of 2.0 kWh.

For the purposes of this report, the geographical coordinates of Osh are 40.528 deg latitude, 72.799 deg longitude, and 3,241 ft elevation.

The topography within 2 miles of Osh contains significant variations in elevation, with a maximum elevation change of 587 feet and an average elevation above sea level of 3,294 feet. Within 10 miles contains significant variations in elevation (3,143 feet). Within 50 miles contains large variations in elevation (14,882 feet).

The area within 2 miles of Osh is covered by cropland (64%) and bare soil (31%), within 10 miles by cropland (52%) and sparse vegetation (38%), and within 50 miles by cropland (37%) and grassland (20%).