October Weather in Koshimizu, Japan

Last updated: August 23, 2025

In October, the average temperature in Koshimizu, Japan hovers around 11°C (51°F). Expect minimums that can dip to 1°C (34°F) and highs reaching up to 21°C (70°F). With an average humidity of 83%, you may want to prepare for the 14 days of rainfall, totaling about 159 mm (6.2 in).

October Temperature in Koshimizu

In October in Koshimizu, the average temperature is 11°C (51°F). The maximum can reach 21°C (70°F), while the minimum can be as low as 1°C (34°F). This weather makes it a great time for travelers to enjoy a mix of cool and mild conditions, perfect for outdoor activities.

October Weather in Koshimizu: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Koshimizu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koshimizu, October typically has an average temperature of 11°C (51°F), with highs reaching up to 21°C (70°F) and lows dropping to around 1°C (34°F).

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

October Precipitation in Koshimizu

In Koshimizu in October, the precipitation amount is 159 mm (6.2 in) during 14 days, indicating a fairly wet period.

October Precipitation Trends in Koshimizu

The chart displays monthly precipitation patterns in Koshimizu, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Koshimizu, October typically receives around 159 mm (6.2 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Koshimizu

In Koshimizu in October, humidity is 83%. With an average temperature of 11°C (51°F), this humidity feels like a chilly dampness that clings to your skin, making any outdoor adventures a bit uncomfortable and best enjoyed with layered clothing and a light raincoat.

October Average Humidity in Koshimizu

This chart illustrates the average monthly humidity levels in Koshimizu, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Koshimizu is approximately 83%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Koshimizu

In Koshimizu in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Koshimizu.

Maximum UV Index Levels in Koshimizu for October

The chart shows the monthly maximum UV Index (UVI) for Koshimizu in October, 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 October, the maximum UV index in Koshimizu typically reaches 5, which falls under the moderate exposure category.

Data source: Koshimizu October 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 October Weather in Koshimizu Compares to Other Months

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

This table compares monthly weather conditions in Koshimizu, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (19°F)	54 mm (2.1 inches)	84%	low
February Weather	-8°C (19°F)	55 mm (2.2 inches)	83%	moderate
March Weather	-2°C (29°F)	88 mm (3.5 inches)	83%	high
April Weather	4°C (39°F)	72 mm (2.8 inches)	83%	high
May Weather	10°C (50°F)	95 mm (3.7 inches)	86%	very high
June Weather	13°C (56°F)	96 mm (3.8 inches)	88%	very high
July Weather	18°C (64°F)	79 mm (3.1 inches)	93%	very high
August Weather	18°C (65°F)	129 mm (5.1 inches)	96%	very high
September Weather	16°C (61°F)	95 mm (3.7 inches)	89%	very high
October Weather	11°C (51°F)	159 mm (6.2 inches)	83%	moderate
November Weather	4°C (40°F)	96 mm (3.8 inches)	80%	moderate
December Weather	-3°C (27°F)	70 mm (2.8 inches)	79%	low