April Weather in Ishii, Japan

Last updated: August 23, 2025

In April, the average temperature in Ishii, Japan is a pleasant 14°C (57°F). You can expect minimums around 3°C (38°F) and maximums reaching 23°C (73°F). Be prepared for some precipitation too, with an average of 145 mm (5.7 in) over 11 days. Additionally, the average humidity hovers around 76%, creating a moderately humid environment.

April Temperature in Ishii

In April in Ishii, the average temperature is 14°C (57°F). The maximum can reach 23°C (73°F) and the minimum can be as low as 3°C (38°F). It's a great time for travelers to enjoy mild weather, making it perfect for outdoor activities and exploration.

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

The chart illustrates April temperature patterns in Ishii, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ishii, April typically has an average temperature of 14°C (57°F), with highs reaching up to 23°C (73°F) and lows dropping to around 3°C (38°F).

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

April Precipitation in Ishii

In Ishii, in April, the precipitation amount is 145 mm (5.7 in) over a span of 11 days.

April Precipitation Trends in Ishii

The chart displays monthly precipitation patterns in Ishii, 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 Ishii, April typically receives around 145 mm (5.7 inches) of precipitation spread over approximately 11 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 Ishii

In Ishii in April humidity is 76%. With an average temperature of 14°C (57°F), this humidity feels like a warm blanket wrapped around you, creating a heavy atmosphere that can make outdoor activities feel sluggish and stifling, urging travelers to seek shade and refreshment more frequently.

April Average Humidity in Ishii

This chart illustrates the average monthly humidity levels in Ishii, 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 Ishii is approximately 76%, 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 Ishii

In Ishii 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 Ishii.

Maximum UV Index Levels in Ishii for April

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

Data source: Ishii 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 Ishii Compares to Other Months

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

This table compares monthly weather conditions in Ishii, 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 (43°F)	60 mm (2.4 inches)	74%	moderate
February Weather	7°C (44°F)	71 mm (2.8 inches)	70%	high
March Weather	10°C (51°F)	137 mm (5.4 inches)	70%	very high
April Weather	14°C (57°F)	145 mm (5.7 inches)	76%	extreme
May Weather	18°C (65°F)	184 mm (7.3 inches)	82%	extreme
June Weather	21°C (71°F)	234 mm (9.2 inches)	86%	extreme
July Weather	26°C (78°F)	378 mm (14.9 inches)	91%	extreme
August Weather	27°C (81°F)	226 mm (8.9 inches)	88%	extreme
September Weather	24°C (75°F)	294 mm (11.6 inches)	85%	very high
October Weather	19°C (67°F)	360 mm (14.2 inches)	82%	high
November Weather	14°C (57°F)	65 mm (2.5 inches)	79%	high
December Weather	9°C (48°F)	64 mm (2.5 inches)	77%	moderate