April Weather in Saku, Japan

Last updated: August 23, 2025

In Saku, Japan, the average temperature in April hovers around 9°C (49°F), offering mild conditions. However, temperatures can fluctuate significantly, dipping as low as -4°C (26°F) and soaring to a maximum of 27°C (81°F). Expect 105 mm (4.1 in) of precipitation over approximately 12 days, accompanied by a relatively high average humidity of 78%.

April Temperature in Saku

In April, in Saku, the average temperature is 9°C (49°F). The maximum can reach 27°C (81°F), while the minimum can drop to as low as -4°C (26°F). This weather offers a varied climate, making it an intriguing time for travelers to explore Saku.

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

The chart illustrates April temperature patterns in Saku, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saku, April typically has an average temperature of 9°C (49°F), with highs reaching up to 27°C (81°F) and lows dropping to around -4°C (26°F).

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

April Precipitation in Saku

In Saku in April, the precipitation amount is 105 mm (4.1 in) over the course of 12 days.

April Precipitation Trends in Saku

The chart displays monthly precipitation patterns in Saku, 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 Saku, April typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 12 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 Saku

In Saku 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 Saku

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

In Saku 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 Saku.

Maximum UV Index Levels in Saku for April

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

Data source: Saku 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 Saku Compares to Other Months

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

This table compares monthly weather conditions in Saku, 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 (31°F)	48 mm (1.9 inches)	88%	moderate
February Weather	1°C (33°F)	49 mm (1.9 inches)	86%	high
March Weather	5°C (41°F)	106 mm (4.2 inches)	81%	very high
April Weather	9°C (49°F)	105 mm (4.1 inches)	78%	very high
May Weather	15°C (59°F)	142 mm (5.6 inches)	81%	extreme
June Weather	18°C (65°F)	193 mm (7.6 inches)	88%	extreme
July Weather	22°C (72°F)	287 mm (11.3 inches)	92%	extreme
August Weather	23°C (75°F)	190 mm (7.5 inches)	92%	extreme
September Weather	19°C (66°F)	185 mm (7.3 inches)	89%	very high
October Weather	13°C (56°F)	253 mm (9.9 inches)	87%	high
November Weather	7°C (45°F)	38 mm (1.5 inches)	85%	moderate
December Weather	2°C (36°F)	50 mm (2.0 inches)	86%	moderate