September Weather in Kuromatsunai, Japan

Last updated: August 23, 2025

In September, the average temperature in Kuromatsunai, Japan hovers around 19°C (66°F). Expect a minimum of 11°C (53°F) and a maximum reaching up to 27°C (81°F). Be prepared for 151 mm (5.9 in) of precipitation spread across 15 days, contributing to a humidity level of 88%.

September Temperature in Kuromatsunai

In September in Kuromatsunai, the average temperature is 19°C (66°F). Maximums can reach 27°C (81°F), and minimums can be as low as 11°C (53°F). Overall, it's a pleasant time to explore Kuromatsunai with comfortable temperatures, making it ideal for outdoor activities.

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

The chart illustrates September temperature patterns in Kuromatsunai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kuromatsunai, September typically has an average temperature of 19°C (66°F), with highs reaching up to 27°C (81°F) and lows dropping to around 11°C (53°F).

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

September Precipitation in Kuromatsunai

In Kuromatsunai in September, the precipitation amount is 151 mm (5.9 in) over a period of 15 days.

September Precipitation Trends in Kuromatsunai

The chart displays monthly precipitation patterns in Kuromatsunai, 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 Kuromatsunai, September typically receives around 151 mm (5.9 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 Kuromatsunai

In Kuromatsunai in September humidity is 88%. With an average temperature of 19°C (66°F), this humidity feels like you're stepping into a warm, enveloping blanket, making outdoor exploration a bit challenging as the air feels heavy and sticky, often sapping your energy and making you crave shade and cool refreshments.

September Average Humidity in Kuromatsunai

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

In Kuromatsunai 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 Kuromatsunai.

Maximum UV Index Levels in Kuromatsunai for September

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

Data source: Kuromatsunai 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 Kuromatsunai Compares to Other Months

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

This table compares monthly weather conditions in Kuromatsunai, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (28°F)	117 mm (4.6 inches)	84%	low
February Weather	-3°C (28°F)	114 mm (4.5 inches)	83%	moderate
March Weather	1°C (35°F)	104 mm (4.1 inches)	81%	high
April Weather	5°C (42°F)	93 mm (3.7 inches)	81%	high
May Weather	11°C (52°F)	90 mm (3.5 inches)	86%	very high
June Weather	15°C (59°F)	119 mm (4.7 inches)	87%	very high
July Weather	20°C (67°F)	116 mm (4.6 inches)	93%	very high
August Weather	21°C (70°F)	158 mm (6.2 inches)	95%	very high
September Weather	19°C (66°F)	151 mm (5.9 inches)	88%	very high
October Weather	13°C (56°F)	165 mm (6.5 inches)	83%	moderate
November Weather	6°C (44°F)	199 mm (7.8 inches)	79%	moderate
December Weather	0°C (31°F)	197 mm (7.7 inches)	80%	low