April Weather in Arai, Japan

Last updated: August 23, 2025

In Arai, Japan, the average temperature in April hovers around 9°C (49°F). Expect temperature extremes with a minimum of -4°C (25°F) and a comfortable maximum of 25°C (77°F). This month, precipitation totals about 146 mm (5.8 in) over 17 days, contributing to an average humidity of 78%.

April Temperature in Arai

In April in Arai, the average temperature is 9°C (49°F). Maximum temperatures can reach 25°C (77°F), while minimums can drop to as low as -4°C (25°F). Be prepared for a wide range of temperatures when you visit, so pack accordingly!

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

The chart illustrates April temperature patterns in Arai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arai, April typically has an average temperature of 9°C (49°F), with highs reaching up to 25°C (77°F) and lows dropping to around -4°C (25°F).

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

April Precipitation in Arai

In Arai in April, the total precipitation amount is 146 mm (5.8 in) distributed over 17 days.

April Precipitation Trends in Arai

The chart displays monthly precipitation patterns in Arai, 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 Arai, April typically receives around 146 mm (5.8 inches) of precipitation spread over approximately 17 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 Arai

In Arai in April, humidity is 78%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that clings to your skin, making it essential to dress in layers while traveling, as the cool air combines with the moisture to create a brisk and invigorating atmosphere.

April Average Humidity in Arai

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

In Arai in April, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Arai.

Maximum UV Index Levels in Arai for April

The chart shows the monthly maximum UV Index (UVI) for Arai 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 Arai typically reaches 9, which falls under the very high exposure category.

Data source: Arai 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 Arai Compares to Other Months

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

This table compares monthly weather conditions in Arai, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	227 mm (8.9 inches)	88%	moderate
February Weather	0°C (33°F)	188 mm (7.4 inches)	86%	moderate
March Weather	4°C (40°F)	149 mm (5.8 inches)	81%	very high
April Weather	9°C (49°F)	146 mm (5.8 inches)	78%	very high
May Weather	16°C (60°F)	152 mm (6.0 inches)	81%	very high
June Weather	19°C (66°F)	173 mm (6.8 inches)	88%	extreme
July Weather	23°C (75°F)	353 mm (13.9 inches)	92%	extreme
August Weather	25°C (77°F)	210 mm (8.3 inches)	92%	extreme
September Weather	20°C (69°F)	207 mm (8.2 inches)	89%	very high
October Weather	15°C (59°F)	235 mm (9.3 inches)	87%	high
November Weather	8°C (48°F)	144 mm (5.7 inches)	85%	moderate
December Weather	2°C (37°F)	247 mm (9.7 inches)	86%	moderate