September Weather in Shunan, Japan

Last updated: August 23, 2025

In September, the average temperature in Shunan, Japan hovers around 24°C (76°F). During this time, temperatures can dip as low as 17°C (63°F) and reach highs of 31°C (88°F). Be prepared for significant precipitation, with totals around 221 mm (8.7 in) spread over 13 days. Plus, expect a muggy atmosphere with an average humidity of 84%, making it a truly tropical experience!

September Temperature in Shunan

In September in Shunan, the average temperature is 24°C (76°F). Maximums can reach 31°C (88°F), while minimums can be as low as 17°C (63°F). This pleasant climate makes Shunan an ideal destination for travelers looking to enjoy mild weather and outdoor activities.

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

The chart illustrates September temperature patterns in Shunan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shunan, September typically has an average temperature of 24°C (76°F), with highs reaching up to 31°C (88°F) and lows dropping to around 17°C (63°F).

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

September Precipitation in Shunan

In Shunan in September, the precipitation amount is 221 mm (8.7 in) spread over a period of 13 days.

September Precipitation Trends in Shunan

The chart displays monthly precipitation patterns in Shunan, 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 Shunan, September typically receives around 221 mm (8.7 inches) of precipitation spread over approximately 13 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 Shunan

In Shunan in September humidity is 84%. With an average temperature of 24°C (76°F), this humidity feels like a warm, damp embrace that can make outdoor activities feel sticky and uncomfortable, requiring frequent breaks in the shade and plenty of hydration for travelers.

September Average Humidity in Shunan

This chart illustrates the average monthly humidity levels in Shunan, 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 Shunan is approximately 84%, 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 Shunan

In Shunan 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 Shunan.

Maximum UV Index Levels in Shunan for September

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

Data source: Shunan 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 Shunan Compares to Other Months

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

This table compares monthly weather conditions in Shunan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	57 mm (2.2 inches)	75%	moderate
February Weather	7°C (45°F)	82 mm (3.2 inches)	71%	moderate
March Weather	10°C (51°F)	130 mm (5.1 inches)	71%	very high
April Weather	14°C (57°F)	144 mm (5.7 inches)	78%	extreme
May Weather	18°C (65°F)	166 mm (6.5 inches)	84%	extreme
June Weather	22°C (71°F)	203 mm (8.0 inches)	86%	extreme
July Weather	26°C (78°F)	358 mm (14.1 inches)	92%	extreme
August Weather	27°C (81°F)	235 mm (9.3 inches)	91%	extreme
September Weather	24°C (76°F)	221 mm (8.7 inches)	84%	very high
October Weather	20°C (67°F)	153 mm (6.0 inches)	83%	high
November Weather	14°C (58°F)	45 mm (1.8 inches)	81%	high
December Weather	9°C (48°F)	65 mm (2.6 inches)	79%	moderate