April Weather in Isen, Japan

Last updated: August 23, 2025

In Isen, Japan, the average temperature in April hovers around 20°C (69°F), with a comfortable range from a minimum of 15°C (58°F) to a maximum of 25°C (77°F). Expect about 114 mm (4.5 in) of precipitation spread over 12 days, and enjoy an average humidity level of 82% that adds to the region's lush allure.

April Temperature in Isen

In April in Isen, the average temperature is 20°C (69°F), with maximums reaching up to 25°C (77°F) and minimums dropping to as low as 15°C (58°F). This mild climate makes it an ideal time for travelers to explore and enjoy all that Isen has to offer.

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

The chart illustrates April temperature patterns in Isen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Isen, April typically has an average temperature of 20°C (69°F), with highs reaching up to 25°C (77°F) and lows dropping to around 15°C (58°F).

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

April Precipitation in Isen

In Isen in April, the precipitation amount is 114 mm (4.5 in) spread over 12 days.

April Precipitation Trends in Isen

The chart displays monthly precipitation patterns in Isen, 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 Isen, April typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 12 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 Isen

In Isen in April humidity is 82%. With an average temperature of 20°C (69°F), this humidity feels like a warm, sticky embrace that clings to your skin, making it necessary to stay hydrated while exploring the sights.

April Average Humidity in Isen

This chart illustrates the average monthly humidity levels in Isen, 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 Isen is approximately 82%, 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 Isen

In Isen in April, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Isen.

Maximum UV Index Levels in Isen for April

The chart shows the monthly maximum UV Index (UVI) for Isen 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 Isen typically reaches 12, which falls under the extreme exposure category.

Data source: Isen 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 Isen Compares to Other Months

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

This table compares monthly weather conditions in Isen, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	17°C (63°F)	109 mm (4.3 inches)	71%	high
February Weather	17°C (63°F)	117 mm (4.6 inches)	71%	very high
March Weather	19°C (66°F)	153 mm (6.0 inches)	76%	extreme
April Weather	20°C (69°F)	114 mm (4.5 inches)	82%	extreme
May Weather	23°C (74°F)	192 mm (7.5 inches)	84%	extreme
June Weather	26°C (78°F)	456 mm (17.9 inches)	86%	extreme
July Weather	28°C (82°F)	208 mm (8.2 inches)	86%	extreme
August Weather	28°C (83°F)	150 mm (5.9 inches)	82%	extreme
September Weather	28°C (82°F)	211 mm (8.3 inches)	82%	extreme
October Weather	25°C (78°F)	137 mm (5.4 inches)	80%	very high
November Weather	22°C (72°F)	130 mm (5.1 inches)	79%	very high
December Weather	19°C (66°F)	127 mm (5.0 inches)	75%	high