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September Weather in Bayan, China

Last updated: August 23, 2025

In September, the average temperature in Bayan, China hovers around 9°C (48°F). Weather can vary significantly, with minimums dipping to -2°C (29°F) and peaks reaching up to 21°C (71°F). Expect 108 mm (4.3 in) of precipitation over 19 days, accompanied by a high average humidity of 82%.

September Temperature in Bayan

In September in Bayan, the average temperature is 9°C (48°F), with maximums reaching 21°C (71°F) and minimums dropping as low as -2°C (29°F). This range makes it a perfect time for travelers to enjoy outdoor activities while being prepared for cooler evenings.

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

The chart illustrates September temperature patterns in Bayan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bayan, September typically has an average temperature of 9°C (48°F), with highs reaching up to 21°C (71°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec131829374551555447362414
Data source: Temperature data for Bayan 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

In Bayan in September, the precipitation amount is 108 mm (4.3 in) spread over 19 days.

September Precipitation Trends in Bayan

The chart displays monthly precipitation patterns in Bayan, 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, September typically receives around 108 mm (4.3 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec8922557610510214010860136
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bayan

In Bayan in September, humidity is 82%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that seeps into your bones, making it essential to dress in layers for your travels while keeping an umbrella handy for unexpected drizzles.

September Average Humidity in Bayan

This chart illustrates the average monthly humidity levels in Bayan, 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 is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%80%81%78%71%77%77%82%82%85%80%71%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bayan

In Bayan in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Bayan.

Maximum UV Index Levels in Bayan for September

The chart shows the monthly maximum UV Index (UVI) for Bayan 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 typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469121314141211864
Data source: Bayan 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 Compares to Other Months

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

This table compares monthly weather conditions in Bayan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-11°C (13°F)8 mm (0.3 inches)74%moderate
February Weather-8°C (19°F)8 mm (0.3 inches)80%high
March Weather-1°C (30°F)22 mm (0.9 inches)81%very high
April Weather3°C (38°F)55 mm (2.1 inches)78%extreme
May Weather7°C (45°F)76 mm (3.0 inches)71%extreme
June Weather11°C (51°F)105 mm (4.1 inches)77%extreme
July Weather13°C (56°F)102 mm (4.0 inches)77%extreme
August Weather12°C (54°F)140 mm (5.5 inches)82%extreme
September Weather9°C (48°F)108 mm (4.3 inches)82%extreme
October Weather2°C (36°F)59 mm (2.3 inches)85%very high
November Weather-5°C (24°F)13 mm (0.5 inches)79%high
December Weather-10°C (14°F)6 mm (0.2 inches)71%moderate

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