September Weather in Shinshiro, Japan

Last updated: August 23, 2025

In September, the average temperature in Shinshiro, Japan is a pleasant 23°C (74°F). Visitors can expect temperatures to range from a cool 12°C (54°F) to a warm 34°C (94°F). However, with 255 mm (10.0 in) of precipitation spread over 21 days, it’s wise to be prepared for showers. The average humidity sits at a balmy 87%, adding to the locale's inviting charm.

September Temperature in Shinshiro

In September in Shinshiro, the average temperature is 23°C (74°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as 12°C (54°F). This comfortable climate makes it an ideal time for travelers to explore and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Shinshiro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shinshiro, September typically has an average temperature of 23°C (74°F), with highs reaching up to 34°C (94°F) and lows dropping to around 12°C (54°F).

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

September Precipitation in Shinshiro

In Shinshiro in September, the precipitation amount is 255 mm (10.0 in) spread over 21 days.

September Precipitation Trends in Shinshiro

The chart displays monthly precipitation patterns in Shinshiro, 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 Shinshiro, September typically receives around 255 mm (10.0 inches) of precipitation spread over approximately 21 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 Shinshiro

In Shinshiro 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 Shinshiro

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

In Shinshiro 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 Shinshiro.

Maximum UV Index Levels in Shinshiro for September

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

Data source: Shinshiro 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 Shinshiro Compares to Other Months

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

This table compares monthly weather conditions in Shinshiro, 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 (39°F)	59 mm (2.3 inches)	82%	moderate
February Weather	5°C (41°F)	77 mm (3.0 inches)	79%	high
March Weather	9°C (49°F)	177 mm (7.0 inches)	74%	very high
April Weather	13°C (56°F)	204 mm (8.0 inches)	76%	very high
May Weather	18°C (65°F)	218 mm (8.6 inches)	83%	extreme
June Weather	21°C (71°F)	258 mm (10.1 inches)	87%	extreme
July Weather	25°C (77°F)	521 mm (20.5 inches)	93%	extreme
August Weather	27°C (81°F)	277 mm (10.9 inches)	91%	extreme
September Weather	23°C (74°F)	255 mm (10.0 inches)	87%	very high
October Weather	18°C (64°F)	280 mm (11.0 inches)	85%	high
November Weather	12°C (54°F)	71 mm (2.8 inches)	83%	moderate
December Weather	6°C (44°F)	69 mm (2.7 inches)	83%	moderate