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September Weather in Yanshan, China

Last updated: August 22, 2025

In September, the average temperature in Yanshan, China is a warm 25°C (78°F). Expect a comfortable range, with minimums dipping to 17°C (62°F) and maximums soaring up to 37°C (99°F). Be prepared for some rain, as you'll encounter an average precipitation of 107 mm (4.2 in) spread across 13 days. With an average humidity of 61%, it's the perfect time to enjoy everything this vibrant destination has to offer!

September Temperature in Yanshan

In September in Yanshan, the average temperature is 25°C (78°F). Maximum temperatures can reach 37°C (99°F), while minimums can drop to as low as 17°C (62°F). This range of temperatures makes Yanshan a great destination for travelers seeking warm and pleasant weather.

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 25°C (78°F), with highs reaching up to 37°C (99°F) and lows dropping to around 17°C (62°F).
JanFebMarAprMayJunJulAugSepOctNovDec545461667277807977706254
Data source: Temperature data for Yanshan generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Yanshan

In Yanshan in September, the total precipitation amount is 107 mm (4.2 in) distributed over a span of 13 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 107 mm (4.2 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec4478152145219292112199107495027
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Yanshan

In Yanshan in September humidity is 61%. With an average temperature of 25°C (78°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities slightly sticky but still enjoyable, especially if you 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 61%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec66%70%77%76%85%80%87%84%61%62%67%74%
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 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, 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 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec79121213131313121097
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.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)44 mm (1.7 inches)66%high
February Weather12°C (54°F)78 mm (3.1 inches)70%very high
March Weather16°C (61°F)152 mm (6.0 inches)77%extreme
April Weather19°C (66°F)145 mm (5.7 inches)76%extreme
May Weather22°C (73°F)219 mm (8.6 inches)85%extreme
June Weather25°C (77°F)292 mm (11.5 inches)80%extreme
July Weather27°C (80°F)112 mm (4.4 inches)87%extreme
August Weather26°C (79°F)199 mm (7.8 inches)84%extreme
September Weather25°C (78°F)107 mm (4.2 inches)61%extreme
October Weather21°C (70°F)49 mm (1.9 inches)62%very high
November Weather17°C (62°F)50 mm (2.0 inches)67%very high
December Weather12°C (55°F)27 mm (1.1 inches)74%high

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