April Weather in Yanai, Japan

Last updated: August 23, 2025

In Yanai, Japan, the average temperature in April hovers around 14°C (58°F). During this month, you can expect a minimum temperature of 6°C (42°F), with a pleasant maximum reaching up to 21°C (70°F). Make sure to prepare for some rain, as 146 mm (5.7 in) of precipitation can fall over 8 days. Don't forget, the average humidity is a comfortable 78%, adding to the overall charm of this time of year.

April Temperature in Yanai

In April in Yanai, the average temperature is 14°C (58°F). Maximums can reach 21°C (70°F), while minimums can dip as low as 6°C (42°F). This mild climate makes Yanai an ideal destination for outdoor activities and exploring the local sights.

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

The chart illustrates April temperature patterns in Yanai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yanai, April typically has an average temperature of 14°C (58°F), with highs reaching up to 21°C (70°F) and lows dropping to around 6°C (42°F).

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

April Precipitation in Yanai

In Yanai in April, the precipitation amount is 146 mm (5.7 in) over the course of 8 days.

April Precipitation Trends in Yanai

The chart displays monthly precipitation patterns in Yanai, 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 Yanai, April typically receives around 146 mm (5.7 inches) of precipitation spread over approximately 8 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 Yanai

In Yanai in April, humidity is 78%. With an average temperature of 14°C (58°F), this humidity feels like a damp embrace, making traveling a bit uncomfortable as the air clings to your skin, causing you to sweat more than usual while exploring.

April Average Humidity in Yanai

This chart illustrates the average monthly humidity levels in Yanai, 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 Yanai is approximately 78%, 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 Yanai

In Yanai 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 Yanai.

Maximum UV Index Levels in Yanai for April

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

Data source: Yanai 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 Yanai Compares to Other Months

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

This table compares monthly weather conditions in Yanai, 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)	54 mm (2.1 inches)	75%	moderate
February Weather	7°C (45°F)	79 mm (3.1 inches)	71%	moderate
March Weather	11°C (51°F)	127 mm (5.0 inches)	71%	very high
April Weather	14°C (58°F)	146 mm (5.7 inches)	78%	extreme
May Weather	18°C (65°F)	159 mm (6.3 inches)	84%	extreme
June Weather	22°C (72°F)	189 mm (7.5 inches)	86%	extreme
July Weather	26°C (79°F)	355 mm (14.0 inches)	92%	extreme
August Weather	28°C (82°F)	221 mm (8.7 inches)	91%	extreme
September Weather	24°C (76°F)	215 mm (8.5 inches)	84%	very high
October Weather	20°C (68°F)	173 mm (6.8 inches)	83%	high
November Weather	15°C (59°F)	43 mm (1.7 inches)	81%	high
December Weather	9°C (49°F)	64 mm (2.5 inches)	79%	moderate