June Weather in Iwamizawa, Japan

Last updated: August 23, 2025

In Iwamizawa, Japan, the average temperature in June hovers around 16°C (61°F). Minimum temperatures can dip to 5°C (41°F), while maximums can soar to 27°C (81°F). Expect approximately 91 mm (3.6 in) of precipitation over 11 days, and be prepared for an average humidity level of 87%.

June Temperature in Iwamizawa

In June in Iwamizawa, the average temperature is 16°C (61°F), with maximums peaking at 27°C (81°F) and minimums dipping to as low as 5°C (41°F). This makes it a great time for travelers to enjoy mild weather with the possibility of warmer days for outdoor activities.

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

The chart illustrates June 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, June typically has an average temperature of 16°C (61°F), with highs reaching up to 27°C (81°F) and lows dropping to around 5°C (41°F).

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

June Precipitation in Iwamizawa

In Iwamizawa in June, the precipitation amount is 91 mm (3.6 in) over a period of 11 days.

June Precipitation Trends in Iwamizawa

The chart displays monthly precipitation patterns in Iwamizawa, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Iwamizawa, June typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

June Humidity in Iwamizawa

In Iwamizawa in June humidity is 87%. With an average temperature of 16°C (61°F), this humidity feels like a heavy blanket wrapping around you, making outdoor exploration sticky and uncomfortable, while also adding a thickness to the air that can sap your energy and enthusiasm for sightseeing.

June Average Humidity in Iwamizawa

This chart illustrates the average monthly humidity levels in Iwamizawa, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Iwamizawa is approximately 87%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Iwamizawa

In Iwamizawa in June, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Iwamizawa.

Maximum UV Index Levels in Iwamizawa for June

The chart shows the monthly maximum UV Index (UVI) for Iwamizawa in June, 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 June, the maximum UV index in Iwamizawa typically reaches 9, which falls under the very high exposure category.

Data source: Iwamizawa June 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 June 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 June’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 June’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