September Weather in Tobetsu, Japan

Last updated: August 23, 2025

In Tobetsu, Japan, the average temperature in September hovers around 18°C (65°F). You can expect a range between a chilly 6°C (44°F) and a warm 29°C (85°F). Be prepared for some rain, as the area receives about 99 mm (3.9 in) of precipitation over 13 days. Additionally, the average humidity is quite high at 88%, making it a humid but comfortable month overall.

September Temperature in Tobetsu

In September in Tobetsu, the average temperature is 18°C (65°F). The maximum can reach 29°C (85°F) and the minimum can be as low as 6°C (44°F). This mild climate makes Tobetsu an ideal destination for travelers looking to enjoy comfortable weather.

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

The chart illustrates September temperature patterns in Tobetsu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tobetsu, September typically has an average temperature of 18°C (65°F), with highs reaching up to 29°C (85°F) and lows dropping to around 6°C (44°F).

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

September Precipitation in Tobetsu

In Tobetsu in September, the precipitation amount is 99 mm (3.9 in) over the course of 13 days.

September Precipitation Trends in Tobetsu

The chart displays monthly precipitation patterns in Tobetsu, 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 Tobetsu, September typically receives around 99 mm (3.9 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 Tobetsu

In Tobetsu in September, humidity is 88%. With an average temperature of 18°C (65°F), this humidity feels like a warm blanket wrapping around you, making travel feel slightly sticky and the air thick, which can be quite tiring when exploring the area.

September Average Humidity in Tobetsu

This chart illustrates the average monthly humidity levels in Tobetsu, 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 Tobetsu is approximately 88%, 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 Tobetsu

In Tobetsu in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Tobetsu.

Maximum UV Index Levels in Tobetsu for September

The chart shows the monthly maximum UV Index (UVI) for Tobetsu 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 Tobetsu typically reaches 8, which falls under the very high exposure category.

Data source: Tobetsu 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 Tobetsu Compares to Other Months

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

This table compares monthly weather conditions in Tobetsu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	52 mm (2.0 inches)	84%	low
February Weather	-4°C (25°F)	64 mm (2.5 inches)	83%	moderate
March Weather	1°C (34°F)	76 mm (3.0 inches)	81%	high
April Weather	6°C (43°F)	73 mm (2.9 inches)	81%	high
May Weather	13°C (55°F)	90 mm (3.5 inches)	86%	very high
June Weather	16°C (61°F)	103 mm (4.1 inches)	87%	very high
July Weather	21°C (69°F)	103 mm (4.1 inches)	93%	very high
August Weather	21°C (71°F)	182 mm (7.2 inches)	95%	very high
September Weather	18°C (65°F)	99 mm (3.9 inches)	88%	very high
October Weather	12°C (54°F)	118 mm (4.7 inches)	83%	moderate
November Weather	5°C (42°F)	127 mm (5.0 inches)	79%	moderate
December Weather	-2°C (29°F)	88 mm (3.4 inches)	80%	low