April Weather in Isehara, Japan

Last updated: August 23, 2025

In Isehara, Japan, the average temperature in April is a mild 13°C (56°F), with fluctuations that can drop to a chilly 0°C (32°F) or rise to a warm 26°C (79°F). During this month, you can expect approximately 148 mm (5.8 in) of precipitation over 13 days, contributing to an average humidity of 74%.

April Temperature in Isehara

In April in Isehara, the average temperature is 13°C (56°F). Maximum temperatures can reach 26°C (79°F), while minimum temperatures can drop as low as 0°C (32°F). It's advisable to pack layers to stay comfortable during your travels.

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

The chart illustrates April temperature patterns in Isehara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Isehara, April typically has an average temperature of 13°C (56°F), with highs reaching up to 26°C (79°F) and lows dropping to around 0°C (32°F).

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

April Precipitation in Isehara

In Isehara in April, the precipitation amount is 148 mm (5.8 in) occurring over the course of 13 days.

April Precipitation Trends in Isehara

The chart displays monthly precipitation patterns in Isehara, 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 Isehara, April typically receives around 148 mm (5.8 inches) of precipitation spread over approximately 13 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 Isehara

In Isehara in April humidity is 74%. With an average temperature of 13°C (56°F), this humidity feels like a damp chill that can make outdoor activities uncomfortable, especially for travelers unaccustomed to such conditions.

April Average Humidity in Isehara

This chart illustrates the average monthly humidity levels in Isehara, 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 Isehara is approximately 74%, 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 Isehara

In Isehara 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 Isehara.

Maximum UV Index Levels in Isehara for April

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

Data source: Isehara 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 Isehara Compares to Other Months

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

This table compares monthly weather conditions in Isehara, 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 (39°F)	57 mm (2.2 inches)	76%	moderate
February Weather	5°C (41°F)	66 mm (2.6 inches)	74%	high
March Weather	9°C (48°F)	177 mm (7.0 inches)	70%	very high
April Weather	13°C (56°F)	148 mm (5.8 inches)	74%	very high
May Weather	18°C (65°F)	140 mm (5.5 inches)	81%	extreme
June Weather	21°C (70°F)	198 mm (7.8 inches)	88%	extreme
July Weather	25°C (77°F)	277 mm (10.9 inches)	93%	extreme
August Weather	27°C (80°F)	157 mm (6.2 inches)	90%	extreme
September Weather	22°C (73°F)	221 mm (8.7 inches)	86%	very high
October Weather	17°C (63°F)	317 mm (12.5 inches)	83%	high
November Weather	12°C (54°F)	84 mm (3.3 inches)	80%	moderate
December Weather	7°C (44°F)	68 mm (2.7 inches)	78%	moderate