October Weather in Koshigaya, Japan

Last updated: August 23, 2025

In October, the average temperature in Koshigaya, Japan hovers around 18°C (65°F). Expect a range that can dip to a cool 6°C (43°F) and rise to a warm 32°C (90°F). With an average humidity of 83%, it's essential to stay hydrated. Be prepared for 249 mm (9.8 in) of precipitation over approximately 15 days, making your umbrella a necessary accessory during this month!

October Temperature in Koshigaya

In October in Koshigaya, the average temperature is 18°C (65°F). The maximum can reach 32°C (90°F), while the minimum can be as low as 6°C (43°F). This makes it a great time for travelers to enjoy a variety of outdoor activities, from warm sunny days to cooler evenings.

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

The chart illustrates October temperature patterns in Koshigaya, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koshigaya, October typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (90°F) and lows dropping to around 6°C (43°F).

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

October Precipitation in Koshigaya

In Koshigaya in October, the precipitation amount is 249 mm (9.8 in) over the course of 15 days.

October Precipitation Trends in Koshigaya

The chart displays monthly precipitation patterns in Koshigaya, 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 Koshigaya, October typically receives around 249 mm (9.8 inches) of precipitation spread over approximately 15 days.

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

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Millimeters (mm) Inches (in)

October Humidity in Koshigaya

In Koshigaya in October, humidity is 83%. With an average temperature of 18°C (65°F), this humidity feels like walking through a warm, damp blanket, making it quite uncomfortable for traveling.

October Average Humidity in Koshigaya

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

In Koshigaya 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 Koshigaya.

Maximum UV Index Levels in Koshigaya for October

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

Data source: Koshigaya 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 Koshigaya Compares to Other Months

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

This table compares monthly weather conditions in Koshigaya, 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 (40°F)	39 mm (1.5 inches)	76%	moderate
February Weather	6°C (43°F)	38 mm (1.5 inches)	74%	moderate
March Weather	10°C (51°F)	122 mm (4.8 inches)	70%	very high
April Weather	14°C (58°F)	111 mm (4.4 inches)	74%	very high
May Weather	20°C (68°F)	111 mm (4.4 inches)	81%	very high
June Weather	23°C (73°F)	134 mm (5.3 inches)	88%	very high
July Weather	26°C (80°F)	225 mm (8.8 inches)	93%	extreme
August Weather	28°C (83°F)	112 mm (4.4 inches)	90%	very high
September Weather	24°C (75°F)	167 mm (6.6 inches)	86%	very high
October Weather	18°C (65°F)	249 mm (9.8 inches)	83%	high
November Weather	13°C (55°F)	63 mm (2.5 inches)	80%	moderate
December Weather	7°C (44°F)	47 mm (1.8 inches)	78%	moderate