April Weather in Koya, Japan

Last updated: August 23, 2025

In April, the average temperature in Koya, Japan is a comfortable 14°C (57°F), with a minimum of 1°C (34°F) and a pleasant maximum of 25°C (77°F). Expect 132 mm (5.2 in) of precipitation spread over about 10 days, contributing to an average humidity level of 76%. Perfect for those who enjoy a mild and slightly damp climate!

April Temperature in Koya

In April in Koya, the average temperature is 14°C (57°F). Maximums can reach 25°C (77°F), while minimums can dip as low as 1°C (34°F). This makes Koya a comfortable destination for travelers looking to enjoy mild weather and explore its attractions.

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

The chart illustrates April temperature patterns in Koya, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koya, April typically has an average temperature of 14°C (57°F), with highs reaching up to 25°C (77°F) and lows dropping to around 1°C (34°F).

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

April Precipitation in Koya

In Koya in April, the total precipitation amount is 132 mm (5.2 in) over a span of 10 days.

April Precipitation Trends in Koya

The chart displays monthly precipitation patterns in Koya, 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 Koya, April typically receives around 132 mm (5.2 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 Koya

In Koya 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 Koya

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

In Koya 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 Koya.

Maximum UV Index Levels in Koya for April

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

Data source: Koya 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 Koya Compares to Other Months

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

This table compares monthly weather conditions in Koya, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	67 mm (2.6 inches)	82%	moderate
February Weather	5°C (41°F)	83 mm (3.3 inches)	79%	high
March Weather	9°C (49°F)	127 mm (5.0 inches)	74%	very high
April Weather	14°C (57°F)	132 mm (5.2 inches)	76%	extreme
May Weather	19°C (66°F)	169 mm (6.7 inches)	83%	extreme
June Weather	22°C (72°F)	220 mm (8.7 inches)	87%	extreme
July Weather	26°C (79°F)	324 mm (12.7 inches)	93%	extreme
August Weather	28°C (82°F)	203 mm (8.0 inches)	91%	extreme
September Weather	24°C (75°F)	204 mm (8.0 inches)	87%	very high
October Weather	18°C (65°F)	265 mm (10.5 inches)	85%	high
November Weather	12°C (54°F)	62 mm (2.4 inches)	83%	high
December Weather	7°C (44°F)	79 mm (3.1 inches)	83%	moderate