September Weather in Yunnanyi, China

Last updated: August 23, 2025

In September, the average temperature in Yunnanyi, China hovers around 20°C (69°F), with a minimum of 12°C (54°F) and a maximum of 29°C (84°F). This time of year also sees 91 mm (3.6 in) of precipitation spread across 18 days, contributing to an average humidity level of 87%. Prepare for a combination of warmth and moisture as you plan your visit!

September Temperature in Yunnanyi

In September in Yunnanyi, the average temperature is 20°C (69°F). Maximums can reach 29°C (84°F) and minimums can be as low as 12°C (54°F). This climate makes Yunnanyi an ideal destination for travelers seeking comfortable weather and diverse activities.

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

The chart illustrates September temperature patterns in Yunnanyi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yunnanyi, September typically has an average temperature of 20°C (69°F), with highs reaching up to 29°C (84°F) and lows dropping to around 12°C (54°F).

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

September Precipitation in Yunnanyi

In Yunnanyi in September, the precipitation amount is 91 mm (3.6 in) spread over 18 days.

September Precipitation Trends in Yunnanyi

The chart displays monthly precipitation patterns in Yunnanyi, 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 Yunnanyi, September typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 18 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 Yunnanyi

In Yunnanyi in September humidity is 87%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making outdoor activities such as sightseeing and hiking quite challenging, as the thick air can leave you feeling sticky and tired quickly.

September Average Humidity in Yunnanyi

This chart illustrates the average monthly humidity levels in Yunnanyi, 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 Yunnanyi 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 Yunnanyi

In Yunnanyi in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Yunnanyi, you can check here.

Maximum UV Index Levels in Yunnanyi for September

The chart shows the monthly maximum UV Index (UVI) for Yunnanyi 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 Yunnanyi typically reaches 14, which falls under the extreme exposure category.

Data source: Yunnanyi 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 Yunnanyi Compares to Other Months

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

This table compares monthly weather conditions in Yunnanyi, 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 (51°F)	17 mm (0.7 inches)	58%	very high
February Weather	12°C (54°F)	11 mm (0.4 inches)	65%	very high
March Weather	16°C (61°F)	14 mm (0.6 inches)	44%	extreme
April Weather	18°C (65°F)	37 mm (1.4 inches)	44%	extreme
May Weather	21°C (70°F)	36 mm (1.4 inches)	62%	extreme
June Weather	23°C (74°F)	89 mm (3.5 inches)	82%	extreme
July Weather	21°C (71°F)	193 mm (7.6 inches)	89%	extreme
August Weather	21°C (70°F)	181 mm (7.1 inches)	90%	extreme
September Weather	20°C (69°F)	91 mm (3.6 inches)	87%	extreme
October Weather	18°C (65°F)	50 mm (2.0 inches)	81%	extreme
November Weather	14°C (58°F)	14 mm (0.6 inches)	82%	very high
December Weather	11°C (51°F)	10 mm (0.4 inches)	73%	high