September Weather in Yanwan, China

Last updated: August 23, 2025

In September, the average temperature in Yanwan, China hovers around 15°C (60°F), with fluctuations that can see lows of 6°C (44°F) and highs reaching up to 26°C (80°F). Expect 218 mm (8.6 in) of precipitation spread over 17 days, contributing to an average humidity of 89%. Perfect for cozy indoor activities or embracing the refreshing rain!

September Temperature in Yanwan

In September in Yanwan, the average temperature is 15°C (60°F). Maximum temperatures can reach 26°C (80°F) and minimums can drop as low as 6°C (44°F). It’s a great time to explore Yanwan while enjoying mild and pleasant weather.

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

The chart illustrates September temperature patterns in Yanwan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yanwan, September typically has an average temperature of 15°C (60°F), with highs reaching up to 26°C (80°F) and lows dropping to around 6°C (44°F).

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

September Precipitation in Yanwan

In Yanwan in September, the total precipitation amount is 218 mm (8.6 in) over the course of 17 days.

September Precipitation Trends in Yanwan

The chart displays monthly precipitation patterns in Yanwan, 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 Yanwan, September typically receives around 218 mm (8.6 inches) of precipitation spread over approximately 17 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 Yanwan

In Yanwan in September, humidity is 89%. With an average temperature of 15°C (60°F), this humidity feels like you're walking through a warm, damp sponge, making outdoor activities quite uncomfortable and often forcing travelers to seek refuge in air-conditioned spaces.

September Average Humidity in Yanwan

This chart illustrates the average monthly humidity levels in Yanwan, 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 Yanwan is approximately 89%, 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 Yanwan

In Yanwan 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 Yanwan.

Maximum UV Index Levels in Yanwan for September

The chart shows the monthly maximum UV Index (UVI) for Yanwan 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 Yanwan typically reaches 11, which falls under the extreme exposure category.

Data source: Yanwan 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 Yanwan Compares to Other Months

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

This table compares monthly weather conditions in Yanwan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	22 mm (0.8 inches)	85%	moderate
February Weather	0°C (32°F)	34 mm (1.3 inches)	87%	high
March Weather	6°C (44°F)	58 mm (2.3 inches)	90%	very high
April Weather	10°C (51°F)	88 mm (3.5 inches)	85%	very high
May Weather	15°C (58°F)	120 mm (4.7 inches)	81%	extreme
June Weather	18°C (65°F)	177 mm (7.0 inches)	86%	extreme
July Weather	20°C (69°F)	174 mm (6.9 inches)	87%	extreme
August Weather	20°C (68°F)	240 mm (9.4 inches)	88%	extreme
September Weather	15°C (60°F)	218 mm (8.6 inches)	89%	extreme
October Weather	9°C (49°F)	165 mm (6.5 inches)	90%	very high
November Weather	4°C (39°F)	44 mm (1.7 inches)	88%	high
December Weather	-2°C (29°F)	24 mm (1.0 inches)	88%	moderate