April Weather in Isa, Japan

Last updated: August 23, 2025

In April, the average temperature in Isa, Japan is a pleasant 16°C (61°F). Expect minimums dipping to 4°C (40°F) and maximums reaching a comfortable 27°C (80°F). Throughout the month, precipitation averages around 159 mm (6.3 in) over 10 days, contributing to an average humidity level of 79%. Be prepared for a mix of cool and warm days!

April Temperature in Isa

In April in Isa, the average temperature is 16°C (61°F). Maximum can reach 27°C (80°F) and minimum can be as low as 4°C (40°F). It's a great time to visit, as the weather is mild and pleasant for outdoor activities.

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

The chart illustrates April temperature patterns in Isa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Isa, April typically has an average temperature of 16°C (61°F), with highs reaching up to 27°C (80°F) and lows dropping to around 4°C (40°F).

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

April Precipitation in Isa

In Isa in April, the total precipitation amount is 159 mm (6.3 in) recorded over a span of 10 days.

April Precipitation Trends in Isa

The chart displays monthly precipitation patterns in Isa, 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 Isa, April typically receives around 159 mm (6.3 inches) of precipitation spread over approximately 10 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 Isa

In Isa in April humidity is 79%. With an average temperature of 16°C (61°F), this humidity feels like a warm, moist embrace, making travel a bit more challenging as the air tends to weigh heavily, but it also offers a refreshing atmosphere perfect for exploring local sights and enjoying nature.

April Average Humidity in Isa

This chart illustrates the average monthly humidity levels in Isa, 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 Isa is approximately 79%, 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 Isa

In Isa in April, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Isa.

Maximum UV Index Levels in Isa for April

The chart shows the monthly maximum UV Index (UVI) for Isa 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 Isa typically reaches 11, which falls under the extreme exposure category.

Data source: Isa 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 Isa Compares to Other Months

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

This table compares monthly weather conditions in Isa, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	61 mm (2.4 inches)	72%	moderate
February Weather	8°C (47°F)	110 mm (4.3 inches)	68%	high
March Weather	12°C (54°F)	162 mm (6.4 inches)	72%	very high
April Weather	16°C (61°F)	159 mm (6.3 inches)	79%	extreme
May Weather	20°C (68°F)	261 mm (10.3 inches)	83%	extreme
June Weather	23°C (74°F)	386 mm (15.2 inches)	86%	extreme
July Weather	26°C (80°F)	483 mm (19.0 inches)	90%	extreme
August Weather	28°C (82°F)	234 mm (9.2 inches)	85%	extreme
September Weather	25°C (77°F)	259 mm (10.2 inches)	80%	extreme
October Weather	20°C (69°F)	141 mm (5.6 inches)	78%	very high
November Weather	14°C (57°F)	102 mm (4.0 inches)	76%	high
December Weather	9°C (48°F)	94 mm (3.7 inches)	74%	moderate