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September Weather in Hai'an, China

Last updated: August 22, 2025

In September, the average temperature in Hai'an, China is a pleasant 24°C (76°F). Expect a range that can dip to a cool 13°C (56°F) and soar to a warm 35°C (95°F). During this time, you can anticipate about 112 mm (4.4 in) of precipitation over 11 days, contributing to a comfortable average humidity of 79%.

September Temperature in Hai'an

In September, in Hai'an, the average temperature is 24°C (76°F), with maximums reaching up to 35°C (95°F) and minimums dropping as low as 13°C (56°F). This pleasant climate makes it an ideal time for outdoor activities and exploration.

September Weather in Hai'an: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Hai'an, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hai'an, September typically has an average temperature of 24°C (76°F), with highs reaching up to 35°C (95°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec394251597076828375645543
Data source: Temperature data for Hai'an 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 Hai'an

In Hai'an in September, the precipitation amount is 112 mm (4.4 in) that occurs over the course of 11 days.

September Precipitation Trends in Hai'an

The chart displays monthly precipitation patterns in Hai'an, 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 Hai'an, September typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec43445164122137251177112544540
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hai'an

In Hai'an in September, humidity is 79%. With an average temperature of 24°C (76°F), this humidity feels like a thick blanket wrapped around you, making traveling somewhat uncomfortable and sticky, as you navigate through the warmth while constantly seeking shade and hydration.

September Average Humidity in Hai'an

This chart illustrates the average monthly humidity levels in Hai'an, 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 Hai'an is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec67%69%79%86%87%90%95%92%79%76%77%73%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hai'an

In Hai'an 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 Hai'an.

Maximum UV Index Levels in Hai'an for September

The chart shows the monthly maximum UV Index (UVI) for Hai'an 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 Hai'an typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101010111110854
Data source: Hai'an 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 Hai'an Compares to Other Months

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

This table compares monthly weather conditions in Hai'an, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)43 mm (1.7 inches)67%moderate
February Weather5°C (42°F)44 mm (1.7 inches)69%high
March Weather11°C (51°F)51 mm (2.0 inches)79%very high
April Weather15°C (60°F)64 mm (2.5 inches)86%very high
May Weather21°C (70°F)122 mm (4.8 inches)87%very high
June Weather25°C (77°F)137 mm (5.4 inches)90%very high
July Weather28°C (82°F)251 mm (9.9 inches)95%extreme
August Weather28°C (83°F)177 mm (7.0 inches)92%extreme
September Weather24°C (76°F)112 mm (4.4 inches)79%very high
October Weather18°C (64°F)54 mm (2.1 inches)76%very high
November Weather13°C (55°F)45 mm (1.8 inches)77%moderate
December Weather6°C (43°F)40 mm (1.6 inches)73%moderate

Compare Hai'an's Climate with Cities Worldwide