April Weather in Niimi, Japan

Last updated: August 23, 2025

In April, the average temperature in Niimi, Japan is a mild 12°C (54°F). However, temperatures can swing from a chilly -2°C (28°F) at night to a pleasant 26°C (80°F) during the day. Expect about 127 mm (5.0 in) of precipitation spread over 10 days, contributing to an average humidity of 74%.

April Temperature in Niimi

In April in Niimi, the average temperature is 12°C (54°F). Maximum temperatures can reach 26°C (80°F), while minimum temperatures can drop as low as -2°C (28°F). This diverse climate makes Niimi a great destination for travelers seeking both mild and cooler weather experiences.

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

The chart illustrates April temperature patterns in Niimi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Niimi, April typically has an average temperature of 12°C (54°F), with highs reaching up to 26°C (80°F) and lows dropping to around -2°C (28°F).

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

April Precipitation in Niimi

In Niimi in April, the precipitation amount is 127 mm (5.0 in), spread over a period of 10 days.

April Precipitation Trends in Niimi

The chart displays monthly precipitation patterns in Niimi, 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 Niimi, April typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 10 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 Niimi

In Niimi in April, humidity is 74%. With an average temperature of 12°C (54°F), this humidity feels like a chilly embrace that can dampen your travel experience, making it essential to dress in layers and prepare for an unexpected drizzle while exploring the sights.

April Average Humidity in Niimi

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

In Niimi 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 Niimi.

Maximum UV Index Levels in Niimi for April

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

Data source: Niimi 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 Niimi Compares to Other Months

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

This table compares monthly weather conditions in Niimi, 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)	52 mm (2.1 inches)	82%	moderate
February Weather	3°C (38°F)	59 mm (2.3 inches)	79%	high
March Weather	8°C (46°F)	116 mm (4.5 inches)	73%	very high
April Weather	12°C (54°F)	127 mm (5.0 inches)	74%	very high
May Weather	17°C (63°F)	115 mm (4.5 inches)	84%	extreme
June Weather	21°C (69°F)	186 mm (7.3 inches)	86%	extreme
July Weather	25°C (77°F)	356 mm (14.0 inches)	92%	extreme
August Weather	26°C (79°F)	242 mm (9.5 inches)	92%	extreme
September Weather	22°C (71°F)	229 mm (9.0 inches)	87%	very high
October Weather	16°C (61°F)	181 mm (7.1 inches)	85%	high
November Weather	10°C (50°F)	37 mm (1.5 inches)	84%	moderate
December Weather	4°C (40°F)	62 mm (2.4 inches)	82%	moderate