April Weather in Tomamae, Japan

Last updated: August 23, 2025

In April, the average temperature in Tomamae, Japan hovers around 6°C (43°F). Temperatures can dip as low as -6°C (21°F) and rise to a pleasant 19°C (66°F). Expect 65 mm (2.6 in) of precipitation spread over 11 days, contributing to an average humidity of 84%.

April Temperature in Tomamae

In April in Tomamae, the average temperature is 6°C (43°F). The maximum can reach 19°C (66°F) and the minimum can be as low as -6°C (21°F). Be prepared for a mix of chilly and mild weather, making it essential to pack layers for your travels.

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

The chart illustrates April temperature patterns in Tomamae, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tomamae, April typically has an average temperature of 6°C (43°F), with highs reaching up to 19°C (66°F) and lows dropping to around -6°C (21°F).

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

April Precipitation in Tomamae

In Tomamae in April, the precipitation amount is 65 mm (2.6 in) over a span of 11 days.

April Precipitation Trends in Tomamae

The chart displays monthly precipitation patterns in Tomamae, 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 Tomamae, April typically receives around 65 mm (2.6 inches) of precipitation spread over approximately 11 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 Tomamae

In Tomamae in April, humidity is 84%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that penetrates your clothing, making outdoor excursions uncomfortable and prompting travelers to seek refuge indoors or find warm, sheltered spots to enjoy their surroundings.

April Average Humidity in Tomamae

This chart illustrates the average monthly humidity levels in Tomamae, 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 Tomamae is approximately 84%, 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 Tomamae

In Tomamae in April, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Tomamae.

Maximum UV Index Levels in Tomamae for April

The chart shows the monthly maximum UV Index (UVI) for Tomamae 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 Tomamae typically reaches 7, which falls under the high exposure category.

Data source: Tomamae 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 Tomamae Compares to Other Months

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

This table compares monthly weather conditions in Tomamae, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (24°F)	67 mm (2.6 inches)	87%	low
February Weather	-4°C (25°F)	80 mm (3.1 inches)	84%	moderate
March Weather	1°C (34°F)	78 mm (3.1 inches)	83%	moderate
April Weather	6°C (43°F)	65 mm (2.6 inches)	84%	high
May Weather	11°C (52°F)	79 mm (3.1 inches)	88%	very high
June Weather	15°C (59°F)	87 mm (3.4 inches)	88%	very high
July Weather	21°C (69°F)	96 mm (3.8 inches)	93%	very high
August Weather	21°C (70°F)	158 mm (6.2 inches)	94%	very high
September Weather	18°C (65°F)	84 mm (3.3 inches)	86%	high
October Weather	12°C (54°F)	150 mm (5.9 inches)	79%	moderate
November Weather	6°C (42°F)	154 mm (6.1 inches)	77%	moderate
December Weather	-1°C (30°F)	124 mm (4.9 inches)	83%	low