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September Weather in Omsk, Russian Federation

Last updated: August 27, 2025

In September, the average temperature in Omsk, Russian Federation hovers around 11°C (52°F). However, be prepared for fluctuations, as temperatures can dip to a minimum of -3°C (27°F) or soar to a maximum of 32°C (89°F). During this month, expect around 45 mm (1.8 in) of precipitation over approximately 8 days, with an average humidity of 71%.

September Temperature in Omsk

In September in Omsk, the average temperature is 11°C (52°F). The maximum can reach 32°C (89°F), and the minimum can drop as low as -3°C (27°F). This variation in temperature makes it essential to pack both warm and light clothing when traveling to Omsk during this month.

September Weather in Omsk: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Omsk, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Omsk, September typically has an average temperature of 11°C (52°F), with highs reaching up to 32°C (89°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec252041566368655140218
Data source: Temperature data for Omsk generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Omsk

In Omsk in September, the precipitation amount is 45 mm (1.8 in) over the course of 8 days.

September Precipitation Trends in Omsk

The chart displays monthly precipitation patterns in Omsk, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Omsk, September typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec172322353764475145332724
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Omsk

In Omsk in September, humidity is 71%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that seeps into your clothes, making outdoor exploration less enjoyable and encouraging frequent breaks in cozy cafes or sheltered spots.

September Average Humidity in Omsk

This chart illustrates the average monthly humidity levels in Omsk, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Omsk is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec98%97%96%85%62%51%49%56%71%83%88%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Omsk

In Omsk in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Omsk.

Maximum UV Index Levels in Omsk for September

The chart shows the monthly maximum UV Index (UVI) for Omsk in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Omsk typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124577765311
Data source: Omsk September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Omsk Compares to Other Months

Weather in Omsk varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Omsk, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Omsk, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-16°C (3°F)17 mm (0.7 inches)98%low
February Weather-15°C (6°F)23 mm (0.9 inches)97%low
March Weather-7°C (20°F)22 mm (0.9 inches)96%moderate
April Weather5°C (41°F)35 mm (1.4 inches)85%moderate
May Weather13°C (57°F)37 mm (1.4 inches)62%high
June Weather17°C (63°F)64 mm (2.5 inches)51%high
July Weather20°C (69°F)47 mm (1.9 inches)49%high
August Weather18°C (65°F)51 mm (2.0 inches)56%high
September Weather11°C (52°F)45 mm (1.8 inches)71%moderate
October Weather4°C (40°F)33 mm (1.3 inches)83%moderate
November Weather-6°C (21°F)27 mm (1.1 inches)88%low
December Weather-13°C (8°F)24 mm (1.0 inches)89%low

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