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September Weather in Yanshan, China

Last updated: August 22, 2025

In September, the average temperature in Yanshan, China is a pleasant 21°C (70°F), creating a perfect backdrop for your adventures. Expect temperatures to range from a minimum of 13°C (55°F) to a maximum of 32°C (90°F). With 223 mm (8.8 in) of precipitation spread over 19 days, don’t forget your umbrella! The average humidity during this time sits at a comfortable 71%, adding to the charm of the season.

September Temperature in Yanshan

In September in Yanshan, the average temperature is 21°C (70°F). Maximum temperatures can reach 32°C (90°F), while the minimum can drop as low as 13°C (55°F). This pleasant climate makes Yanshan an ideal destination for outdoor activities and sightseeing.

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 21°C (70°F), with highs reaching up to 32°C (90°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec384251596672777769595041
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 223 mm (8.8 in), which occurs over the course of 19 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 223 mm (8.8 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec75761441402532592171662231429555
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 71%. With an average temperature of 21°C (70°F), this humidity feels like a warm, sticky embrace, making outdoor activities feel slightly heavy and requiring regular breaks to stay refreshed while exploring.

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 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec68%73%84%82%86%86%88%85%71%74%85%75%
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 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 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec689121212131210975
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 Weather4°C (39°F)75 mm (2.9 inches)67%high
February Weather5°C (42°F)76 mm (3.0 inches)73%very high
March Weather11°C (51°F)144 mm (5.7 inches)84%very high
April Weather15°C (59°F)140 mm (5.5 inches)82%extreme
May Weather19°C (66°F)253 mm (10.0 inches)86%extreme
June Weather22°C (72°F)259 mm (10.2 inches)86%extreme
July Weather25°C (77°F)217 mm (8.6 inches)88%extreme
August Weather25°C (77°F)166 mm (6.5 inches)85%extreme
September Weather21°C (70°F)223 mm (8.8 inches)71%very high
October Weather15°C (59°F)142 mm (5.6 inches)74%very high
November Weather10°C (51°F)95 mm (3.7 inches)85%high
December Weather5°C (41°F)55 mm (2.2 inches)75%moderate

Compare Yanshan's Climate with Cities Worldwide