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September Weather in Bayan Uula Sumu, Mongolia

Last updated: August 28, 2025

In Bayan Uula Sumu, Mongolia, the average temperature in September hovers around 15°C (58°F), with extremes ranging from a brisk -4°C (25°F) to a warm 30°C (86°F). During this period, you can expect approximately 11 mm (0.4 in) of precipitation spread over 3 days, accompanied by an average humidity level of 43%.

September Temperature in Bayan Uula Sumu

In September in Bayan Uula Sumu, the average temperature is 15°C (58°F). Maximum temperatures can reach up to 30°C (86°F) while the minimum can drop as low as -4°C (25°F). Be prepared for varying weather conditions while traveling during this time.

September Weather in Bayan Uula Sumu: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Bayan Uula Sumu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bayan Uula Sumu, September typically has an average temperature of 15°C (58°F), with highs reaching up to 30°C (86°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec7143146586972685839239
Data source: Temperature data for Bayan Uula Sumu 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 Bayan Uula Sumu

In Bayan Uula Sumu in September, the precipitation amount is 11 mm (0.4 in) over the course of 3 days.

September Precipitation Trends in Bayan Uula Sumu

The chart displays monthly precipitation patterns in Bayan Uula Sumu, 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 Bayan Uula Sumu, September typically receives around 11 mm (0.4 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec239899252511432
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bayan Uula Sumu

In Bayan Uula Sumu in September humidity is 43%. With an average temperature of 15°C (58°F), this humidity feels like a refreshing yet slightly crisp environment, making it quite pleasant for exploring the local attractions without the discomfort of excess moisture in the air.

September Average Humidity in Bayan Uula Sumu

This chart illustrates the average monthly humidity levels in Bayan Uula Sumu, 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 Bayan Uula Sumu is approximately 43%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%68%47%45%34%35%37%42%43%47%56%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bayan Uula Sumu

In Bayan Uula Sumu in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Bayan Uula Sumu.

Maximum UV Index Levels in Bayan Uula Sumu for September

The chart shows the monthly maximum UV Index (UVI) for Bayan Uula Sumu 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 Bayan Uula Sumu typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2368101010107532
Data source: Bayan Uula Sumu 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 Bayan Uula Sumu Compares to Other Months

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

This table compares monthly weather conditions in Bayan Uula Sumu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-14°C (7°F)1 mm (0.1 inches)82%low
February Weather-10°C (14°F)3 mm (0.1 inches)68%moderate
March Weather-1°C (31°F)8 mm (0.3 inches)47%high
April Weather8°C (46°F)8 mm (0.3 inches)45%very high
May Weather15°C (58°F)9 mm (0.3 inches)34%very high
June Weather20°C (69°F)9 mm (0.4 inches)35%very high
July Weather22°C (73°F)25 mm (1.0 inches)37%very high
August Weather20°C (68°F)25 mm (1.0 inches)42%very high
September Weather15°C (58°F)11 mm (0.4 inches)43%high
October Weather4°C (39°F)4 mm (0.1 inches)47%moderate
November Weather-5°C (24°F)3 mm (0.1 inches)56%moderate
December Weather-13°C (9°F)2 mm (0.1 inches)80%low

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