September Weather in China, United States

Last updated: June 24, 2025

In September, the average temperature in China, United States is a pleasant 26°C (79°F). However, be prepared for fluctuations, as temperatures can dip to a cool 13°C (56°F) or rise to a warm 35°C (95°F). Expect 219 mm (8.6 in) of precipitation spread over 16 days, contributing to the area's average humidity of 75%. Whether you're planning outdoor adventures or cozy in-door activities, it's wise to be ready for the varied climate!

September Temperature in China

In September in China, the average temperature is 26°C (79°F). Maximums can reach 35°C (95°F), and minimums can be as low as 13°C (56°F). This mild climate makes it an ideal time for outdoor adventures and sightseeing.

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

The chart illustrates September temperature patterns in China, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In China, September typically has an average temperature of 26°C (79°F), with highs reaching up to 35°C (95°F) and lows dropping to around 13°C (56°F).

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

September Precipitation in China

In China in September, the precipitation amount is 219 mm (8.6 in) spread over 16 days.

September Precipitation Trends in China

The chart displays monthly precipitation patterns in China, 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 China, September typically receives around 219 mm (8.6 inches) of precipitation spread over approximately 16 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 China

In China in September, humidity is 75%. With an average temperature of 26°C (79°F), this humidity feels like a warm blanket wrapped around you, making traveling a sticky experience where every step requires extra effort and frequent breaks to cool off.

September Average Humidity in China

This chart illustrates the average monthly humidity levels in China, 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 China is approximately 75%, 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 China

In China in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in China.

Maximum UV Index Levels in China for September

The chart shows the monthly maximum UV Index (UVI) for China 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 China typically reaches 10, which falls under the very high exposure category.

Data source: China 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 China Compares to Other Months

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

This table compares monthly weather conditions in China, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	98 mm (3.8 inches)	79%	moderate
February Weather	14°C (58°F)	91 mm (3.6 inches)	80%	very high
March Weather	18°C (65°F)	84 mm (3.3 inches)	78%	very high
April Weather	20°C (69°F)	123 mm (4.8 inches)	81%	extreme
May Weather	25°C (77°F)	192 mm (7.6 inches)	79%	extreme
June Weather	27°C (81°F)	184 mm (7.2 inches)	75%	extreme
July Weather	28°C (83°F)	162 mm (6.4 inches)	74%	extreme
August Weather	28°C (83°F)	244 mm (9.6 inches)	73%	extreme
September Weather	26°C (79°F)	219 mm (8.6 inches)	75%	very high
October Weather	22°C (72°F)	154 mm (6.1 inches)	75%	very high
November Weather	16°C (61°F)	78 mm (3.1 inches)	79%	high
December Weather	14°C (58°F)	143 mm (5.6 inches)	83%	moderate