October Weather in Koga, Japan

Last updated: August 23, 2025

In October, the average temperature in Koga, Japan hovers around 18°C (64°F). Temperatures can vary significantly, with a minimum of 5°C (41°F) and a maximum reaching 32°C (89°F). Expect about 258 mm (10.1 in) of precipitation over 16 days, contributing to the average humidity level of a high 87%. Prepare for a mix of weather in this vibrant locale!

October Temperature in Koga

In October in Koga, the average temperature is 18°C (64°F). The maximum can reach 32°C (89°F), and the minimum can be as low as 5°C (41°F). This wide range of temperatures makes Koga a versatile destination for travelers, offering both warm days and cooler evenings.

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

The chart illustrates October temperature patterns in Koga, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koga, October typically has an average temperature of 18°C (64°F), with highs reaching up to 32°C (89°F) and lows dropping to around 5°C (41°F).

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

October Precipitation in Koga

In Koga in October, the precipitation amount is 258 mm (10.1 in) over the course of 16 days.

October Precipitation Trends in Koga

The chart displays monthly precipitation patterns in Koga, 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 Koga, October typically receives around 258 mm (10.1 inches) of precipitation spread over approximately 16 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 Koga

In Koga in October humidity is 87%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as the air clings to your skin and saps your energy, urging you to seek shade and refreshing drinks more frequently.

October Average Humidity in Koga

This chart illustrates the average monthly humidity levels in Koga, 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 Koga is approximately 87%, 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 Koga

In Koga in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Koga, you can refer to this Hourly UV Index in Koga.

Maximum UV Index Levels in Koga for October

The chart shows the monthly maximum UV Index (UVI) for Koga 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 Koga typically reaches 6, which falls under the high exposure category.

Data source: Koga 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 Koga Compares to Other Months

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

This table compares monthly weather conditions in Koga, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	38 mm (1.5 inches)	88%	moderate
February Weather	5°C (41°F)	41 mm (1.6 inches)	86%	moderate
March Weather	9°C (49°F)	131 mm (5.2 inches)	81%	high
April Weather	14°C (57°F)	129 mm (5.1 inches)	78%	very high
May Weather	19°C (66°F)	137 mm (5.4 inches)	81%	very high
June Weather	22°C (72°F)	160 mm (6.3 inches)	88%	extreme
July Weather	26°C (78°F)	258 mm (10.2 inches)	92%	extreme
August Weather	27°C (82°F)	156 mm (6.1 inches)	92%	very high
September Weather	23°C (74°F)	195 mm (7.7 inches)	89%	very high
October Weather	18°C (64°F)	258 mm (10.1 inches)	87%	high
November Weather	12°C (53°F)	67 mm (2.6 inches)	85%	moderate
December Weather	6°C (43°F)	50 mm (2.0 inches)	86%	moderate