October Weather in Iwanai, Japan

Last updated: August 23, 2025

In Iwanai, Japan, the average temperature in October hovers around 12°C (53°F). Expect a cool range with a minimum of 3°C (37°F) and a pleasant maximum of 22°C (72°F). Prepare for a rather damp month, with 149 mm (5.9 in) of precipitation expected over 17 days, resulting in an average humidity level of 83%.

October Temperature in Iwanai

In October in Iwanai, the average temperature is 12°C (53°F). The maximum can reach 22°C (72°F) and the minimum can be as low as 3°C (37°F). This moderate climate makes it a great time to explore the local attractions while enjoying comfortable weather.

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

The chart illustrates October temperature patterns in Iwanai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iwanai, October typically has an average temperature of 12°C (53°F), with highs reaching up to 22°C (72°F) and lows dropping to around 3°C (37°F).

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

October Precipitation in Iwanai

In Iwanai in October, the precipitation amount is 149 mm (5.9 in) spread over 17 days.

October Precipitation Trends in Iwanai

The chart displays monthly precipitation patterns in Iwanai, 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 Iwanai, October typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 17 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 Iwanai

In Iwanai in October humidity is 83%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and necessitating layers to stay comfortable while traveling.

October Average Humidity in Iwanai

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

In Iwanai 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 Iwanai.

Maximum UV Index Levels in Iwanai for October

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

Data source: Iwanai 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 Iwanai Compares to Other Months

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

This table compares monthly weather conditions in Iwanai, 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 (25°F)	99 mm (3.9 inches)	84%	low
February Weather	-3°C (26°F)	103 mm (4.1 inches)	83%	moderate
March Weather	1°C (34°F)	98 mm (3.8 inches)	81%	moderate
April Weather	5°C (41°F)	88 mm (3.4 inches)	81%	high
May Weather	11°C (53°F)	86 mm (3.4 inches)	86%	very high
June Weather	15°C (59°F)	109 mm (4.3 inches)	87%	very high
July Weather	20°C (68°F)	94 mm (3.7 inches)	93%	very high
August Weather	21°C (70°F)	145 mm (5.7 inches)	95%	very high
September Weather	18°C (64°F)	126 mm (5.0 inches)	88%	very high
October Weather	12°C (53°F)	149 mm (5.9 inches)	83%	moderate
November Weather	5°C (41°F)	176 mm (6.9 inches)	79%	moderate
December Weather	-2°C (29°F)	159 mm (6.3 inches)	80%	low