April Weather in Isahaya, Japan

Last updated: August 23, 2025

In April, the average temperature in Isahaya, Japan is a comfortable 15°C (60°F), with a minimum of 7°C (46°F) and a maximum reaching up to 23°C (73°F). Expect a fair amount of precipitation during this time, averaging 143 mm (5.6 in) over 9 days. With an average humidity of 79%, those visiting should be prepared for a slightly damp yet pleasant climate.

April Temperature in Isahaya

In April in Isahaya, the average temperature is 15°C (60°F), with maximums reaching up to 23°C (73°F) and minimums dipping to as low as 7°C (46°F). This mild climate makes it an ideal time for travelers to explore and enjoy outdoor activities in Isahaya.

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

The chart illustrates April temperature patterns in Isahaya, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Isahaya, April typically has an average temperature of 15°C (60°F), with highs reaching up to 23°C (73°F) and lows dropping to around 7°C (46°F).

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

April Precipitation in Isahaya

In Isahaya, in April, the precipitation amount is 143 mm (5.6 in) over the course of 9 days.

April Precipitation Trends in Isahaya

The chart displays monthly precipitation patterns in Isahaya, 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 Isahaya, April typically receives around 143 mm (5.6 inches) of precipitation spread over approximately 9 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 Isahaya

In Isahaya in April, humidity is 79%. With an average temperature of 15°C (60°F), this humidity feels like a warm, enveloping blanket that can make traveling feel muggy and a bit stifling, requiring frequent breaks to stay refreshed and hydrated.

April Average Humidity in Isahaya

This chart illustrates the average monthly humidity levels in Isahaya, 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 Isahaya 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 Isahaya

In Isahaya 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 Isahaya.

Maximum UV Index Levels in Isahaya for April

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

Data source: Isahaya 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 Isahaya Compares to Other Months

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

This table compares monthly weather conditions in Isahaya, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	61 mm (2.4 inches)	73%	moderate
February Weather	9°C (48°F)	106 mm (4.2 inches)	69%	high
March Weather	12°C (54°F)	157 mm (6.2 inches)	71%	very high
April Weather	15°C (60°F)	143 mm (5.6 inches)	79%	extreme
May Weather	19°C (67°F)	229 mm (9.0 inches)	87%	extreme
June Weather	22°C (73°F)	272 mm (10.7 inches)	91%	extreme
July Weather	26°C (79°F)	442 mm (17.4 inches)	97%	extreme
August Weather	28°C (82°F)	326 mm (12.8 inches)	94%	extreme
September Weather	25°C (77°F)	225 mm (8.9 inches)	84%	extreme
October Weather	20°C (69°F)	117 mm (4.6 inches)	79%	very high
November Weather	15°C (60°F)	81 mm (3.2 inches)	75%	high
December Weather	10°C (51°F)	92 mm (3.6 inches)	72%	moderate