September Weather in Shiso, Japan

Last updated: August 23, 2025

In September, the average temperature in Shiso, Japan is a pleasant 23°C (74°F). Expect a minimum of 12°C (54°F), while highs can reach up to 34°C (93°F). With 237 mm (9.3 in) of precipitation over 15 days, don't forget your umbrella! Additionally, the average humidity sits at a cozy 87%, making for a truly tropical atmosphere.

September Temperature in Shiso

In September in Shiso, the average temperature is 23°C (74°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as 12°C (54°F). This pleasant climate makes Shiso an ideal destination for travelers seeking a comfortable getaway during this time of year.

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

The chart illustrates September temperature patterns in Shiso, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shiso, September typically has an average temperature of 23°C (74°F), with highs reaching up to 34°C (93°F) and lows dropping to around 12°C (54°F).

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

September Precipitation in Shiso

In Shiso in September, the total precipitation amount is 237 mm (9.3 in) recorded over a period of 15 days.

September Precipitation Trends in Shiso

The chart displays monthly precipitation patterns in Shiso, 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 Shiso, September typically receives around 237 mm (9.3 inches) of precipitation spread over approximately 15 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 Shiso

In Shiso in September, humidity is 87%. With an average temperature of 23°C (74°F), this humidity feels like a warm, sticky embrace that can quickly wear you down while traveling, making even short walks feel exhausting and necessitating frequent breaks for hydration and cool air.

September Average Humidity in Shiso

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

In Shiso 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 Shiso.

Maximum UV Index Levels in Shiso for September

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

Data source: Shiso 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 Shiso Compares to Other Months

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

This table compares monthly weather conditions in Shiso, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	42 mm (1.7 inches)	82%	moderate
February Weather	5°C (41°F)	56 mm (2.2 inches)	79%	high
March Weather	9°C (48°F)	116 mm (4.6 inches)	73%	very high
April Weather	13°C (56°F)	135 mm (5.3 inches)	74%	extreme
May Weather	18°C (65°F)	127 mm (5.0 inches)	84%	extreme
June Weather	22°C (71°F)	170 mm (6.7 inches)	86%	extreme
July Weather	26°C (79°F)	326 mm (12.8 inches)	92%	extreme
August Weather	27°C (82°F)	241 mm (9.5 inches)	92%	extreme
September Weather	23°C (74°F)	237 mm (9.3 inches)	87%	very high
October Weather	18°C (64°F)	205 mm (8.1 inches)	85%	high
November Weather	12°C (53°F)	38 mm (1.5 inches)	84%	moderate
December Weather	6°C (44°F)	58 mm (2.3 inches)	82%	moderate