October Weather in Iwamizawa, Japan

Last updated: August 23, 2025

In October, the average temperature in Iwamizawa, Japan hovers around 11°C (53°F), with fluctuations that can see it dip to a chilly -2°C (29°F) or rise to a pleasant 24°C (75°F). Expect 120 mm (4.7 in) of precipitation spread over 15 days, contributing to an average humidity of 83%. Don't forget your umbrella!

October Temperature in Iwamizawa

In October in Iwamizawa, the average temperature is 11°C (53°F). Maximum temperatures can reach 24°C (75°F), while the minimum can drop as low as -2°C (29°F). This varied climate makes Iwamizawa an interesting destination for travelers seeking a mix of mild days and chilly evenings.

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

The chart illustrates October temperature patterns in Iwamizawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iwamizawa, October typically has an average temperature of 11°C (53°F), with highs reaching up to 24°C (75°F) and lows dropping to around -2°C (29°F).

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

October Precipitation in Iwamizawa

In Iwamizawa in October, the precipitation amount is 120 mm (4.7 in) spread over 15 days.

October Precipitation Trends in Iwamizawa

The chart displays monthly precipitation patterns in Iwamizawa, 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 Iwamizawa, October typically receives around 120 mm (4.7 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 Iwamizawa

In Iwamizawa in October, humidity is 83%. With an average temperature of 11°C (53°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and causing an inevitable sheen of sweat to form, which can dampen the joy of exploring your surroundings.

October Average Humidity in Iwamizawa

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

In Iwamizawa 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 Iwamizawa.

Maximum UV Index Levels in Iwamizawa for October

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

Data source: Iwamizawa 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 Iwamizawa Compares to Other Months

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

This table compares monthly weather conditions in Iwamizawa, 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 (21°F)	48 mm (1.9 inches)	84%	low
February Weather	-5°C (24°F)	61 mm (2.4 inches)	83%	moderate
March Weather	1°C (34°F)	75 mm (2.9 inches)	81%	high
April Weather	7°C (44°F)	72 mm (2.8 inches)	81%	high
May Weather	13°C (55°F)	89 mm (3.5 inches)	86%	very high
June Weather	16°C (61°F)	91 mm (3.6 inches)	87%	very high
July Weather	20°C (69°F)	84 mm (3.3 inches)	93%	very high
August Weather	21°C (70°F)	164 mm (6.5 inches)	95%	very high
September Weather	18°C (64°F)	85 mm (3.3 inches)	88%	very high
October Weather	11°C (53°F)	120 mm (4.7 inches)	83%	moderate
November Weather	5°C (41°F)	115 mm (4.5 inches)	79%	moderate
December Weather	-3°C (27°F)	84 mm (3.3 inches)	80%	low