September Weather in Yanshan, China

Last updated: August 22, 2025

In September, the average temperature in Yanshan, China hovers around 27°C (82°F). Expect a minimum of 19°C (66°F) and occasionally soaring to a maximum of 38°C (101°F). Prepare for 103 mm (4.1 in) of precipitation spread over approximately 12 days, and enjoy a comfortable average humidity level of 63%.

September Temperature in Yanshan

In September in Yanshan, the average temperature is 27°C (82°F). Maximums can reach 38°C (101°F), and minimums can be as low as 19°C (66°F). This weather makes it an ideal time for travelers looking to enjoy warm and pleasant conditions.

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

The chart illustrates September temperature patterns in Yanshan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yanshan, September typically has an average temperature of 27°C (82°F), with highs reaching up to 38°C (101°F) and lows dropping to around 19°C (66°F).

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

September Precipitation in Yanshan

In Yanshan in September, the total precipitation amount is 103 mm (4.1 in), occurring over the course of 12 days.

September Precipitation Trends in Yanshan

The chart displays monthly precipitation patterns in Yanshan, 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 Yanshan, September typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 12 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 Yanshan

In Yanshan in September, humidity is 63%. With an average temperature of 27°C (82°F), this humidity feels like a warm embrace that can make outdoor activities a bit sticky, so travelers will want to stay hydrated and take breaks in the shade.

September Average Humidity in Yanshan

This chart illustrates the average monthly humidity levels in Yanshan, 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 Yanshan is approximately 63%, 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 Yanshan

In Yanshan 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 Yanshan.

Maximum UV Index Levels in Yanshan for September

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

Data source: Yanshan 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 Yanshan Compares to Other Months

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

This table compares monthly weather conditions in Yanshan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (51°F)	92 mm (3.6 inches)	62%	high
February Weather	12°C (54°F)	129 mm (5.1 inches)	66%	very high
March Weather	17°C (62°F)	305 mm (12.0 inches)	73%	extreme
April Weather	20°C (68°F)	243 mm (9.6 inches)	70%	extreme
May Weather	24°C (76°F)	271 mm (10.7 inches)	84%	extreme
June Weather	27°C (81°F)	335 mm (13.2 inches)	83%	extreme
July Weather	29°C (84°F)	216 mm (8.5 inches)	89%	extreme
August Weather	29°C (84°F)	170 mm (6.7 inches)	87%	extreme
September Weather	27°C (82°F)	103 mm (4.1 inches)	63%	extreme
October Weather	22°C (71°F)	89 mm (3.5 inches)	59%	very high
November Weather	17°C (63°F)	110 mm (4.3 inches)	66%	very high
December Weather	12°C (53°F)	62 mm (2.4 inches)	69%	high