September Weather in Yanshan, China

Last updated: August 22, 2025

In Yanshan, China, the average temperature in September hovers around a pleasant 23°C (73°F). Expect a range between a cool 11°C (52°F) and a warm 34°C (94°F). With an average humidity of 60%, conditions are quite comfortable. Be prepared for some rainfall, as 46 mm (1.8 in) of precipitation is likely over 4 days.

September Temperature in Yanshan

In September in Yanshan, the average temperature is 23°C (73°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as 11°C (52°F). This makes it a great time for traveling, offering a comfortable climate for outdoor activities and exploration.

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 23°C (73°F), with highs reaching up to 34°C (94°F) and lows dropping to around 11°C (52°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 precipitation amount is 46 mm (1.8 in) over the course of 4 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 46 mm (1.8 inches) of precipitation spread over approximately 4 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Yanshan

In Yanshan in September humidity is 60%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace that can leave travelers feeling slightly sticky but comfortable, making it ideal for exploring the outdoors during the cooler parts of the day.

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 60%, 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 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 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 8, which falls under the very high 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	-2°C (29°F)	2 mm (0.1 inches)	38%	low
February Weather	2°C (36°F)	8 mm (0.3 inches)	47%	moderate
March Weather	9°C (49°F)	14 mm (0.5 inches)	53%	high
April Weather	15°C (60°F)	32 mm (1.3 inches)	69%	very high
May Weather	22°C (71°F)	34 mm (1.4 inches)	60%	very high
June Weather	26°C (80°F)	69 mm (2.7 inches)	63%	very high
July Weather	28°C (83°F)	161 mm (6.3 inches)	79%	extreme
August Weather	27°C (80°F)	203 mm (8.0 inches)	76%	very high
September Weather	23°C (73°F)	46 mm (1.8 inches)	60%	very high
October Weather	14°C (58°F)	37 mm (1.5 inches)	66%	high
November Weather	8°C (47°F)	22 mm (0.9 inches)	73%	moderate
December Weather	0°C (33°F)	2 mm (0.1 inches)	57%	low