April Weather in Oiso, Japan

Last updated: August 23, 2025

In April, the average temperature in Oiso, Japan is a comfortable 13°C (57°F). You can expect temperatures to range from a chilly 4°C (40°F) to a warm 22°C (72°F). During this time, precipitation averages 162 mm (6.4 in) over 13 days, contributing to a humidity level of around 74%.

April Temperature in Oiso

In April in Oiso, the average temperature is 13°C (57°F). Maximum temperatures can reach 22°C (72°F), and minimums can be as low as 4°C (40°F). Be sure to pack layers for your trip to Oiso to comfortably enjoy the mild days and cool evenings.

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

The chart illustrates April temperature patterns in Oiso, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oiso, April typically has an average temperature of 13°C (57°F), with highs reaching up to 22°C (72°F) and lows dropping to around 4°C (40°F).

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

April Precipitation in Oiso

In Oiso in April, the precipitation amount is 162 mm (6.4 in) spread over 13 days.

April Precipitation Trends in Oiso

The chart displays monthly precipitation patterns in Oiso, 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 Oiso, April typically receives around 162 mm (6.4 inches) of precipitation spread over approximately 13 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 Oiso

In Oiso in April humidity is 74%. With an average temperature of 13°C (57°F), this humidity feels like a blanket of moisture wrapping around you, making outdoor excursions less comfortable and adding a stickiness to the air that could quickly fatigue travelers.

April Average Humidity in Oiso

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

In Oiso in April, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Oiso.

Maximum UV Index Levels in Oiso for April

The chart shows the monthly maximum UV Index (UVI) for Oiso 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 Oiso typically reaches 10, which falls under the very high exposure category.

Data source: Oiso 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 Oiso Compares to Other Months

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

This table compares monthly weather conditions in Oiso, 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 (44°F)	69 mm (2.7 inches)	76%	moderate
February Weather	7°C (45°F)	75 mm (3.0 inches)	74%	moderate
March Weather	10°C (51°F)	195 mm (7.7 inches)	70%	very high
April Weather	13°C (57°F)	162 mm (6.4 inches)	74%	very high
May Weather	18°C (64°F)	166 mm (6.5 inches)	81%	extreme
June Weather	21°C (70°F)	224 mm (8.8 inches)	88%	extreme
July Weather	24°C (76°F)	263 mm (10.3 inches)	93%	extreme
August Weather	26°C (80°F)	159 mm (6.2 inches)	90%	extreme
September Weather	23°C (74°F)	235 mm (9.3 inches)	86%	very high
October Weather	19°C (66°F)	346 mm (13.6 inches)	83%	high
November Weather	14°C (58°F)	115 mm (4.5 inches)	80%	moderate
December Weather	9°C (49°F)	91 mm (3.6 inches)	78%	moderate