September Weather in Otoineppu, Japan

Last updated: August 23, 2025

The average temperature in Otoineppu, Japan during September is a mild 16°C (61°F). Expect temperatures to range from a cool 3°C (38°F) to a warm 30°C (86°F). This month also sees 90 mm (3.6 in) of precipitation spread across 14 days, contributing to an average humidity of a comfortable 86%. Enjoy the diverse weather, perfect for a variety of activities!

September Temperature in Otoineppu

In September in Otoineppu, the average temperature is 16°C (61°F), with maximums reaching 30°C (86°F) and minimums dropping as low as 3°C (38°F). This variation in temperature makes it an ideal time for travelers to enjoy both warm days and cooler evenings while exploring the area.

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

The chart illustrates September temperature patterns in Otoineppu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Otoineppu, September typically has an average temperature of 16°C (61°F), with highs reaching up to 30°C (86°F) and lows dropping to around 3°C (38°F).

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

September Precipitation in Otoineppu

In Otoineppu in September, the precipitation amount is 90 mm (3.6 in) accumulated over a span of 14 days.

September Precipitation Trends in Otoineppu

The chart displays monthly precipitation patterns in Otoineppu, 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 Otoineppu, September typically receives around 90 mm (3.6 inches) of precipitation spread over approximately 14 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 Otoineppu

In Otoineppu in September, humidity is 86%. With an average temperature of 16°C (61°F), this humidity feels like walking through a warm, thick blanket of air that clings to your skin, making outdoor activities feel sticky and uncomfortable for traveling.

September Average Humidity in Otoineppu

This chart illustrates the average monthly humidity levels in Otoineppu, 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 Otoineppu is approximately 86%, 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 Otoineppu

In Otoineppu in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Otoineppu.

Maximum UV Index Levels in Otoineppu for September

The chart shows the monthly maximum UV Index (UVI) for Otoineppu 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 Otoineppu typically reaches 7, which falls under the high exposure category.

Data source: Otoineppu 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 Otoineppu Compares to Other Months

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

This table compares monthly weather conditions in Otoineppu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (19°F)	71 mm (2.8 inches)	87%	low
February Weather	-7°C (21°F)	79 mm (3.1 inches)	84%	moderate
March Weather	-1°C (31°F)	87 mm (3.4 inches)	83%	moderate
April Weather	4°C (40°F)	70 mm (2.8 inches)	84%	high
May Weather	11°C (52°F)	95 mm (3.8 inches)	88%	very high
June Weather	14°C (57°F)	96 mm (3.8 inches)	88%	very high
July Weather	19°C (67°F)	99 mm (3.9 inches)	93%	very high
August Weather	19°C (67°F)	150 mm (5.9 inches)	94%	very high
September Weather	16°C (61°F)	90 mm (3.6 inches)	86%	high
October Weather	10°C (49°F)	136 mm (5.4 inches)	79%	moderate
November Weather	3°C (37°F)	137 mm (5.4 inches)	77%	moderate
December Weather	-5°C (24°F)	100 mm (3.9 inches)	83%	low