October Weather in Kosai, Japan

Last updated: August 23, 2025

The average temperature in Kosai, Japan during October is a comfortable 20°C (68°F). You might experience a minimum of 10°C (50°F) and a maximum of 31°C (89°F). Expect 284 mm (11.2 in) of precipitation spread over approximately 15 days, accompanied by a high average humidity of 85%.

October Temperature in Kosai

In October in Kosai, the average temperature is 20°C (68°F). Maximums can reach 31°C (89°F), and minimums can be as low as 10°C (50°F). This moderate climate makes Kosai an ideal destination for travelers seeking pleasant weather and a range of outdoor activities.

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

The chart illustrates October temperature patterns in Kosai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kosai, October typically has an average temperature of 20°C (68°F), with highs reaching up to 31°C (89°F) and lows dropping to around 10°C (50°F).

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

October Precipitation in Kosai

In Kosai in October, the precipitation amount is 284 mm (11.2 in) during a span of 15 days.

October Precipitation Trends in Kosai

The chart displays monthly precipitation patterns in Kosai, 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 Kosai, October typically receives around 284 mm (11.2 inches) of precipitation spread over approximately 15 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 Kosai

In Kosai in October, humidity is 85%. With an average temperature of 20°C (68°F), this humidity feels like a warm, sticky blanket enveloping you, making outdoor activities quite uncomfortable and prompting travelers to seek shade and hydration more frequently.

October Average Humidity in Kosai

This chart illustrates the average monthly humidity levels in Kosai, 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 Kosai is approximately 85%, 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 Kosai

In Kosai in October, 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 Kosai.

Maximum UV Index Levels in Kosai for October

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

Data source: Kosai 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 Kosai Compares to Other Months

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

This table compares monthly weather conditions in Kosai, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (44°F)	49 mm (1.9 inches)	82%	moderate
February Weather	7°C (45°F)	69 mm (2.7 inches)	79%	moderate
March Weather	12°C (53°F)	154 mm (6.1 inches)	74%	very high
April Weather	16°C (60°F)	160 mm (6.3 inches)	76%	very high
May Weather	20°C (69°F)	187 mm (7.4 inches)	83%	extreme
June Weather	23°C (74°F)	240 mm (9.4 inches)	87%	extreme
July Weather	27°C (81°F)	385 mm (15.2 inches)	93%	extreme
August Weather	29°C (85°F)	189 mm (7.4 inches)	91%	extreme
September Weather	25°C (78°F)	217 mm (8.5 inches)	87%	very high
October Weather	20°C (68°F)	284 mm (11.2 inches)	85%	high
November Weather	14°C (58°F)	75 mm (2.9 inches)	83%	moderate
December Weather	9°C (48°F)	65 mm (2.6 inches)	83%	moderate