April Weather in Iwamizawa, Japan

Last updated: August 23, 2025

In April, the average temperature in Iwamizawa, Japan hovers around 7°C (44°F), with the possibility of dipping as low as -5°C (24°F) and peaking at a comfortable 22°C (72°F). Be prepared for approximately 72 mm (2.8 in) of precipitation over about 12 days, and don’t forget your umbrella, as humidity lingers around a substantial 81%!

April Temperature in Iwamizawa

In April in Iwamizawa, the average temperature is 7°C (44°F). Maximums can reach 22°C (72°F), while minimums can drop as low as -5°C (24°F). Be prepared for a wide range of temperatures to ensure a comfortable travel experience.

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

The chart illustrates April 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, April typically has an average temperature of 7°C (44°F), with highs reaching up to 22°C (72°F) and lows dropping to around -5°C (24°F).

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

April Precipitation in Iwamizawa

In Iwamizawa in April, the total precipitation amount is 72 mm (2.8 in) over the course of 12 days.

April Precipitation Trends in Iwamizawa

The chart displays monthly precipitation patterns in Iwamizawa, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Iwamizawa, April typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 12 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Iwamizawa

In Iwamizawa in April humidity is 81%. With an average temperature of 7°C (44°F), this humidity feels like a damp chill that seeps into your bones, making it essential to dress warmly while exploring.

April Average Humidity in Iwamizawa

This chart illustrates the average monthly humidity levels in Iwamizawa, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Iwamizawa is approximately 81%, offering insight into how humid the weather typically is during this month.

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

April UV Index in Iwamizawa

In Iwamizawa in April, 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 Iwamizawa.

Maximum UV Index Levels in Iwamizawa for April

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

Data source: Iwamizawa April 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 April 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 April’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 April’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