September Weather in Onsu, China

Last updated: August 22, 2025

In September, the average temperature in Onsu, China is a pleasant 17°C (63°F). Expect minimums dipping to 6°C (42°F) and maximums reaching up to 31°C (87°F). During this time, you can anticipate 20 mm (0.8 in) of precipitation spread over about 4 days, with an average humidity level of 39%. Enjoy the mild climate!

September Temperature in Onsu

In September in Onsu, the average temperature is 17°C (63°F). Maximum temperatures can reach 31°C (87°F), while the minimum can drop as low as 6°C (42°F). This variety in temperatures makes it wise to pack layers to fully enjoy your travel experience.

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

The chart illustrates September temperature patterns in Onsu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onsu, September typically has an average temperature of 17°C (63°F), with highs reaching up to 31°C (87°F) and lows dropping to around 6°C (42°F).

Data source: Temperature data for Onsu generated using information from the Copernicus Climate Change Service.

September Precipitation in Onsu

In Onsu in September, the total precipitation amount is 20 mm (0.8 in) spread over a period of 4 days.

September Precipitation Trends in Onsu

The chart displays monthly precipitation patterns in Onsu, 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 Onsu, September typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 4 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Onsu

In Onsu in September, humidity is 39%. With an average temperature of 17°C (63°F), this humidity feels like a comfortable and refreshing backdrop for traveling, where the air is crisp and invigorating, making outdoor exploration enjoyable and pleasant.

September Average Humidity in Onsu

This chart illustrates the average monthly humidity levels in Onsu, 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 Onsu is approximately 39%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Onsu

In Onsu in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Onsu.

Maximum UV Index Levels in Onsu for September

The chart shows the monthly maximum UV Index (UVI) for Onsu 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 Onsu typically reaches 8, which falls under the very high exposure category.

Data source: Onsu 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 Onsu Compares to Other Months

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

This table compares monthly weather conditions in Onsu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	2 mm (0.1 inches)	49%	low
February Weather	-2°C (29°F)	6 mm (0.3 inches)	42%	moderate
March Weather	6°C (44°F)	4 mm (0.2 inches)	45%	high
April Weather	13°C (56°F)	25 mm (1.0 inches)	39%	very high
May Weather	19°C (66°F)	16 mm (0.6 inches)	36%	very high
June Weather	21°C (70°F)	17 mm (0.7 inches)	36%	very high
July Weather	23°C (74°F)	13 mm (0.5 inches)	36%	very high
August Weather	21°C (71°F)	29 mm (1.1 inches)	37%	very high
September Weather	17°C (63°F)	20 mm (0.8 inches)	39%	very high
October Weather	10°C (50°F)	13 mm (0.5 inches)	47%	moderate
November Weather	1°C (35°F)	7 mm (0.3 inches)	49%	moderate
December Weather	-5°C (23°F)	2 mm (0.1 inches)	51%	low