April Weather in Iruma, Japan

Last updated: August 23, 2025

In April, the average temperature in Iruma, Japan hovers around 12°C (54°F), with a range between a minimum of -2°C (29°F) and a warm maximum of 26°C (79°F). Expect 150 mm (5.9 in) of precipitation spread over approximately 15 days, contributing to an average humidity level of 74%. 🌧️

April Temperature in Iruma

In April in Iruma, the average temperature is 12°C (54°F), with maximums reaching 26°C (79°F) and minimums dipping as low as -2°C (29°F). This variation in temperatures makes it essential for travelers to pack layers to stay comfortable throughout the day.

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

The chart illustrates April temperature patterns in Iruma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iruma, April typically has an average temperature of 12°C (54°F), with highs reaching up to 26°C (79°F) and lows dropping to around -2°C (29°F).

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

April Precipitation in Iruma

In Iruma in April, the total precipitation amount is 150 mm (5.9 in) over a span of 15 days.

April Precipitation Trends in Iruma

The chart displays monthly precipitation patterns in Iruma, 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 Iruma, April typically receives around 150 mm (5.9 inches) of precipitation spread over approximately 15 days.

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

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Millimeters (mm) Inches (in)

April Humidity in Iruma

In Iruma in April, humidity is 74%. With an average temperature of 12°C (54°F), this humidity feels like a chilly embrace that can dampen your travel experience, making it essential to dress in layers and prepare for an unexpected drizzle while exploring the sights.

April Average Humidity in Iruma

This chart illustrates the average monthly humidity levels in Iruma, 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 Iruma is approximately 74%, 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 Iruma

In Iruma in April, 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 Iruma.

Maximum UV Index Levels in Iruma for April

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

Data source: Iruma 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 Iruma Compares to Other Months

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

This table compares monthly weather conditions in Iruma, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (37°F)	53 mm (2.1 inches)	76%	moderate
February Weather	4°C (40°F)	62 mm (2.4 inches)	74%	high
March Weather	8°C (47°F)	166 mm (6.5 inches)	70%	very high
April Weather	12°C (54°F)	150 mm (5.9 inches)	74%	very high
May Weather	17°C (64°F)	148 mm (5.8 inches)	81%	extreme
June Weather	20°C (69°F)	209 mm (8.2 inches)	88%	extreme
July Weather	24°C (76°F)	312 mm (12.3 inches)	93%	extreme
August Weather	26°C (79°F)	195 mm (7.7 inches)	90%	extreme
September Weather	22°C (71°F)	247 mm (9.7 inches)	86%	very high
October Weather	16°C (61°F)	346 mm (13.6 inches)	83%	high
November Weather	11°C (52°F)	72 mm (2.8 inches)	80%	moderate
December Weather	5°C (42°F)	62 mm (2.4 inches)	78%	moderate