September Weather in Longchuan, China

Last updated: August 22, 2025

In September, the average temperature in Longchuan, China hovers around 19°C (67°F). You can expect a minimum of 11°C (52°F) and a warm maximum of 28°C (82°F). However, be prepared for a bit of rain, as 140 mm (5.5 in) of precipitation spreads over 22 days, contributing to a high average humidity level of 87%.

September Temperature in Longchuan

In September in Longchuan, the average temperature is 19°C (67°F). Maximums can reach 28°C (82°F) and minimums can be as low as 11°C (52°F). This makes it an ideal time for travelers looking to enjoy mild weather while exploring the area.

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

The chart illustrates September temperature patterns in Longchuan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Longchuan, September typically has an average temperature of 19°C (67°F), with highs reaching up to 28°C (82°F) and lows dropping to around 11°C (52°F).

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

September Precipitation in Longchuan

In Longchuan in September, the total precipitation amount is 140 mm (5.5 in) spread over 22 days.

September Precipitation Trends in Longchuan

The chart displays monthly precipitation patterns in Longchuan, 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 Longchuan, September typically receives around 140 mm (5.5 inches) of precipitation spread over approximately 22 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 Longchuan

In Longchuan in September, humidity is 87%. With an average temperature of 19°C (67°F), this humidity feels like a warm blanket wrapping around you, making traveling a bit heavier and leaving you craving for refreshing drinks and shade throughout the day.

September Average Humidity in Longchuan

This chart illustrates the average monthly humidity levels in Longchuan, 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 Longchuan is approximately 87%, 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 Longchuan

In Longchuan in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Longchuan.

Maximum UV Index Levels in Longchuan for September

The chart shows the monthly maximum UV Index (UVI) for Longchuan 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 Longchuan typically reaches 13, which falls under the extreme exposure category.

Data source: Longchuan 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 Longchuan Compares to Other Months

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

This table compares monthly weather conditions in Longchuan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	27 mm (1.1 inches)	58%	very high
February Weather	12°C (54°F)	13 mm (0.5 inches)	65%	very high
March Weather	16°C (61°F)	16 mm (0.6 inches)	44%	extreme
April Weather	18°C (64°F)	48 mm (1.9 inches)	44%	extreme
May Weather	20°C (69°F)	50 mm (2.0 inches)	62%	extreme
June Weather	22°C (72°F)	153 mm (6.0 inches)	82%	extreme
July Weather	20°C (69°F)	267 mm (10.5 inches)	89%	extreme
August Weather	20°C (69°F)	244 mm (9.6 inches)	90%	extreme
September Weather	19°C (67°F)	140 mm (5.5 inches)	87%	extreme
October Weather	17°C (63°F)	78 mm (3.1 inches)	81%	extreme
November Weather	14°C (57°F)	27 mm (1.1 inches)	82%	very high
December Weather	10°C (51°F)	14 mm (0.6 inches)	73%	high