September Weather in Heyun, China

Last updated: August 22, 2025

In September, the average temperature in Heyun, China hovers around 27°C (81°F), with a range that fluctuates from a cool 17°C (62°F) to a warm 35°C (95°F). Be prepared for the possibility of rain, as the area receives an average precipitation of 164 mm (6.4 in) over 18 days, all while maintaining a typical humidity level of 75%.

September Temperature in Heyun

In September in Heyun, the average temperature is 27°C (81°F). Maximum temperatures can reach 35°C (95°F), while minimums can drop to as low as 17°C (62°F). This pleasant climate makes Heyun an ideal destination for travelers seeking a warm escape.

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

The chart illustrates September temperature patterns in Heyun, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Heyun, September typically has an average temperature of 27°C (81°F), with highs reaching up to 35°C (95°F) and lows dropping to around 17°C (62°F).

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

September Precipitation in Heyun

In Heyun in September, the precipitation amount is 164 mm (6.4 in) over the course of 18 days.

September Precipitation Trends in Heyun

The chart displays monthly precipitation patterns in Heyun, 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 Heyun, September typically receives around 164 mm (6.4 inches) of precipitation spread over approximately 18 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 Heyun

In Heyun in September, humidity is 75%. With an average temperature of 27°C (81°F), this humidity feels like a blanket of warmth enveloping you, making outdoor activities sticky and potentially uncomfortable for traveling.

September Average Humidity in Heyun

This chart illustrates the average monthly humidity levels in Heyun, 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 Heyun is approximately 75%, 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 Heyun

In Heyun in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Heyun.

Maximum UV Index Levels in Heyun for September

The chart shows the monthly maximum UV Index (UVI) for Heyun 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 Heyun typically reaches 11, which falls under the extreme exposure category.

Data source: Heyun 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 Heyun Compares to Other Months

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

This table compares monthly weather conditions in Heyun, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	42 mm (1.6 inches)	64%	high
February Weather	14°C (57°F)	114 mm (4.5 inches)	68%	very high
March Weather	18°C (65°F)	205 mm (8.1 inches)	73%	extreme
April Weather	21°C (70°F)	224 mm (8.8 inches)	71%	extreme
May Weather	25°C (78°F)	228 mm (9.0 inches)	79%	extreme
June Weather	27°C (81°F)	472 mm (18.6 inches)	77%	extreme
July Weather	28°C (83°F)	236 mm (9.3 inches)	88%	extreme
August Weather	28°C (83°F)	291 mm (11.5 inches)	88%	extreme
September Weather	27°C (81°F)	164 mm (6.4 inches)	75%	extreme
October Weather	23°C (73°F)	75 mm (2.9 inches)	65%	very high
November Weather	19°C (66°F)	46 mm (1.8 inches)	64%	very high
December Weather	14°C (57°F)	29 mm (1.1 inches)	69%	high