September Weather in Sihai, China

Last updated: August 22, 2025

In Sihai, China, the average temperature in September hovers around 19°C (67°F), with lows of 5°C (41°F) and highs reaching up to 33°C (92°F). Expect about 75 mm (2.9 in) of precipitation spread over 8 days, while the average humidity sits at a comfortable 74%. Enjoy the dynamic climate that awaits you!

September Temperature in Sihai

In September in Sihai, the average temperature is 19°C (67°F), with maximums that can reach 33°C (92°F) and minimums that can drop as low as 5°C (41°F). This diverse temperature range makes Sihai a great destination for travelers seeking a mix of pleasant days and cooler evenings.

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

The chart illustrates September temperature patterns in Sihai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sihai, September typically has an average temperature of 19°C (67°F), with highs reaching up to 33°C (92°F) and lows dropping to around 5°C (41°F).

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

September Precipitation in Sihai

In Sihai in September, the precipitation amount is 75 mm (2.9 in) over a span of 8 days.

September Precipitation Trends in Sihai

The chart displays monthly precipitation patterns in Sihai, 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 Sihai, September typically receives around 75 mm (2.9 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Sihai

In Sihai in September, humidity is 74%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel stifling, often leading travelers to seek shade and hydrate frequently.

September Average Humidity in Sihai

This chart illustrates the average monthly humidity levels in Sihai, 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 Sihai is approximately 74%, 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 Sihai

In Sihai in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Sihai.

Maximum UV Index Levels in Sihai for September

The chart shows the monthly maximum UV Index (UVI) for Sihai 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 Sihai typically reaches 8, which falls under the very high exposure category.

Data source: Sihai 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 Sihai Compares to Other Months

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

This table compares monthly weather conditions in Sihai, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	2 mm (0.1 inches)	65%	low
February Weather	-3°C (27°F)	8 mm (0.3 inches)	59%	moderate
March Weather	5°C (42°F)	19 mm (0.7 inches)	52%	moderate
April Weather	12°C (55°F)	22 mm (0.9 inches)	56%	very high
May Weather	19°C (66°F)	29 mm (1.1 inches)	56%	very high
June Weather	23°C (74°F)	63 mm (2.5 inches)	68%	very high
July Weather	25°C (77°F)	262 mm (10.3 inches)	78%	very high
August Weather	24°C (75°F)	197 mm (7.8 inches)	83%	very high
September Weather	19°C (67°F)	75 mm (2.9 inches)	74%	very high
October Weather	10°C (51°F)	37 mm (1.5 inches)	74%	high
November Weather	2°C (37°F)	18 mm (0.7 inches)	58%	moderate
December Weather	-5°C (24°F)	3 mm (0.1 inches)	60%	low