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September Weather in Yiwan, China

Last updated: August 23, 2025

In September, the average temperature in Yiwan, China hovers around 25°C (77°F). Expect a minimum temperature of 16°C (62°F) and a maximum reaching up to 38°C (101°F). With 115 mm (4.5 in) of precipitation over about 12 days, it’s wise to prepare for some wet weather. Additionally, the average humidity sits at a comfortable 70%, creating a warm, inviting atmosphere for your visit!

September Temperature in Yiwan

In September in Yiwan, the average temperature is 25°C (77°F). Maximums can reach 38°C (101°F), and minimums can be as low as 16°C (62°F). This pleasant climate makes Yiwan an ideal destination for outdoor activities and sightseeing during this time of year.

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

The chart illustrates September temperature patterns in Yiwan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yiwan, September typically has an average temperature of 25°C (77°F), with highs reaching up to 38°C (101°F) and lows dropping to around 16°C (62°F).
JanFebMarAprMayJunJulAugSepOctNovDec414656647279848477655646
Data source: Temperature data for Yiwan 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 Yiwan

In Yiwan in September, the total precipitation amount is 115 mm (4.5 in) over a span of 12 days.

September Precipitation Trends in Yiwan

The chart displays monthly precipitation patterns in Yiwan, 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 Yiwan, September typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec5657103130172194180150115695531
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Yiwan

In Yiwan in September, humidity is 70%. With an average temperature of 25°C (77°F), this humidity feels like walking through a warm, moist blanket that clings to your skin, making every step feel heavier as you explore the sights and sounds of your destination.

September Average Humidity in Yiwan

This chart illustrates the average monthly humidity levels in Yiwan, 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 Yiwan is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec71%75%86%86%86%87%89%86%70%73%83%76%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Yiwan

In Yiwan 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 Yiwan.

Maximum UV Index Levels in Yiwan for September

The chart shows the monthly maximum UV Index (UVI) for Yiwan 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 Yiwan typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec668101111121210965
Data source: Yiwan 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 Yiwan Compares to Other Months

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

This table compares monthly weather conditions in Yiwan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)56 mm (2.2 inches)71%high
February Weather8°C (46°F)57 mm (2.2 inches)75%high
March Weather13°C (56°F)103 mm (4.1 inches)86%very high
April Weather18°C (64°F)130 mm (5.1 inches)86%very high
May Weather22°C (72°F)172 mm (6.8 inches)86%extreme
June Weather26°C (79°F)194 mm (7.6 inches)87%extreme
July Weather29°C (84°F)180 mm (7.1 inches)89%extreme
August Weather29°C (85°F)150 mm (5.9 inches)86%extreme
September Weather25°C (77°F)115 mm (4.5 inches)70%very high
October Weather18°C (65°F)69 mm (2.7 inches)72%very high
November Weather14°C (57°F)54 mm (2.1 inches)82%high
December Weather8°C (46°F)31 mm (1.2 inches)76%moderate

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