April Weather in Seiro, Japan

Last updated: August 23, 2025

In April, the average temperature in Seiro, Japan hovers around 11°C (52°F), with a range from a brisk 1°C (33°F) to a pleasant 24°C (76°F). Expect about 140 mm (5.5 in) of precipitation spread over 16 days, contributing to an average humidity of 78%.

April Temperature in Seiro

In April in Seiro, the average temperature is 11°C (52°F), with maximums reaching 24°C (76°F) and minimums dropping to 1°C (33°F). This weather makes it an ideal time for travelers seeking a mild climate and opportunities for outdoor exploration.

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

The chart illustrates April temperature patterns in Seiro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seiro, April typically has an average temperature of 11°C (52°F), with highs reaching up to 24°C (76°F) and lows dropping to around 1°C (33°F).

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

April Precipitation in Seiro

In Seiro in April, the total precipitation amount is 140 mm (5.5 in) spread over 16 days.

April Precipitation Trends in Seiro

The chart displays monthly precipitation patterns in Seiro, 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 Seiro, April typically receives around 140 mm (5.5 inches) of precipitation spread over approximately 16 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 Seiro

In Seiro in April humidity is 78%. With an average temperature of 11°C (52°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities somewhat uncomfortable and travel more challenging as you navigate the moist air.

April Average Humidity in Seiro

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

In Seiro in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Seiro.

Maximum UV Index Levels in Seiro for April

The chart shows the monthly maximum UV Index (UVI) for Seiro 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 Seiro typically reaches 8, which falls under the very high exposure category.

Data source: Seiro 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 Seiro Compares to Other Months

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

This table compares monthly weather conditions in Seiro, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (37°F)	203 mm (8.0 inches)	88%	moderate
February Weather	3°C (37°F)	171 mm (6.7 inches)	86%	moderate
March Weather	7°C (44°F)	147 mm (5.8 inches)	81%	high
April Weather	11°C (52°F)	140 mm (5.5 inches)	78%	very high
May Weather	17°C (63°F)	135 mm (5.3 inches)	81%	very high
June Weather	21°C (69°F)	141 mm (5.5 inches)	88%	very high
July Weather	25°C (78°F)	317 mm (12.5 inches)	92%	very high
August Weather	27°C (80°F)	281 mm (11.1 inches)	92%	extreme
September Weather	22°C (73°F)	175 mm (6.9 inches)	89%	very high
October Weather	17°C (62°F)	179 mm (7.1 inches)	87%	high
November Weather	11°C (52°F)	194 mm (7.6 inches)	85%	moderate
December Weather	5°C (41°F)	267 mm (10.5 inches)	86%	moderate