September Weather in Haiyu, China

Last updated: August 23, 2025

In Haiyu, China, the average temperature in September is a pleasant 25°C (77°F), ranging from a minimum of 15°C (59°F) to a warm maximum of 35°C (95°F). Expect 134 mm (5.3 in) of precipitation spread over 12 days, with an average humidity of 81%. Perfect weather for those who love a bit of warmth and don’t mind the occasional shower!

September Temperature in Haiyu

In September in Haiyu, the average temperature is 25°C (77°F). The maximum can reach 35°C (95°F), while the minimum can be as low as 15°C (59°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy the outdoor attractions in Haiyu.

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

The chart illustrates September temperature patterns in Haiyu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Haiyu, September typically has an average temperature of 25°C (77°F), with highs reaching up to 35°C (95°F) and lows dropping to around 15°C (59°F).

Data source: Temperature data for Haiyu generated using information from the Copernicus Climate Change Service.

September Precipitation in Haiyu

In Haiyu in September, the precipitation amount is 134 mm (5.3 in) over a period of 12 days.

September Precipitation Trends in Haiyu

The chart displays monthly precipitation patterns in Haiyu, 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 Haiyu, September typically receives around 134 mm (5.3 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Haiyu

In Haiyu in September, humidity is 81%. With an average temperature of 25°C (77°F), this humidity feels like walking through a warm, thick blanket, making traveling quite challenging as you may feel sticky and sluggish, requiring frequent breaks to stay refreshed and hydrated.

September Average Humidity in Haiyu

This chart illustrates the average monthly humidity levels in Haiyu, 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 Haiyu is approximately 81%, 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 Haiyu

In Haiyu 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 Haiyu.

Maximum UV Index Levels in Haiyu for September

The chart shows the monthly maximum UV Index (UVI) for Haiyu 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 Haiyu typically reaches 10, which falls under the very high exposure category.

Data source: Haiyu 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 Haiyu Compares to Other Months

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

This table compares monthly weather conditions in Haiyu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	54 mm (2.1 inches)	70%	moderate
February Weather	6°C (44°F)	56 mm (2.2 inches)	73%	high
March Weather	12°C (53°F)	68 mm (2.7 inches)	81%	very high
April Weather	16°C (61°F)	73 mm (2.9 inches)	87%	very high
May Weather	22°C (71°F)	120 mm (4.7 inches)	87%	very high
June Weather	25°C (77°F)	161 mm (6.3 inches)	89%	extreme
July Weather	29°C (84°F)	256 mm (10.1 inches)	93%	extreme
August Weather	29°C (85°F)	154 mm (6.1 inches)	91%	extreme
September Weather	25°C (77°F)	134 mm (5.3 inches)	81%	very high
October Weather	19°C (66°F)	46 mm (1.8 inches)	80%	very high
November Weather	14°C (57°F)	44 mm (1.7 inches)	82%	high
December Weather	7°C (45°F)	42 mm (1.6 inches)	77%	moderate