March Weather in Isumi, Japan

Last updated: August 23, 2025

In March, the average temperature in Isumi, Japan hovers around 12°C (54°F), with daytime highs reaching up to 19°C (67°F) and cool nights dipping to a minimum of 4°C (40°F). Expect 180 mm (7.1 in) of precipitation spread over about 14 days, resulting in an average humidity of 68%. Prepare for a blend of mild temperatures and occasional rain!

March Temperature in Isumi

In March in Isumi, the average temperature is 12°C (54°F), with a maximum that can reach 19°C (67°F) and a minimum that can dip as low as 4°C (40°F). This mild climate makes it a great time for travelers to explore Isumi comfortably.

March Weather in Isumi: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Isumi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Isumi, March typically has an average temperature of 12°C (54°F), with highs reaching up to 19°C (67°F) and lows dropping to around 4°C (40°F).

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

March Precipitation in Isumi

In Isumi in March, the total precipitation amount is 180 mm (7.1 in) spread over 14 days.

March Precipitation Trends in Isumi

The chart displays monthly precipitation patterns in Isumi, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Isumi, March typically receives around 180 mm (7.1 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

March Humidity in Isumi

In Isumi in March, humidity is 68%. With an average temperature of 12°C (54°F), this humidity feels like a damp chill that can make exploring the area a bit uncomfortable, often requiring warm layers to stay cozy while sightseeing.

March Average Humidity in Isumi

This chart illustrates the average monthly humidity levels in Isumi, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Isumi is approximately 68%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Isumi

In Isumi in March, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Isumi.

Maximum UV Index Levels in Isumi for March

The chart shows the monthly maximum UV Index (UVI) for Isumi in March, 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 March, the maximum UV index in Isumi typically reaches 8, which falls under the very high exposure category.

Data source: Isumi March 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 March Weather in Isumi Compares to Other Months

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

This table compares monthly weather conditions in Isumi, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	77 mm (3.0 inches)	70%	moderate
February Weather	9°C (48°F)	68 mm (2.7 inches)	69%	moderate
March Weather	12°C (54°F)	180 mm (7.1 inches)	68%	very high
April Weather	15°C (59°F)	117 mm (4.6 inches)	73%	very high
May Weather	19°C (67°F)	140 mm (5.5 inches)	81%	extreme
June Weather	22°C (72°F)	206 mm (8.1 inches)	88%	extreme
July Weather	25°C (78°F)	206 mm (8.1 inches)	94%	extreme
August Weather	27°C (81°F)	113 mm (4.5 inches)	87%	extreme
September Weather	25°C (77°F)	214 mm (8.4 inches)	83%	very high
October Weather	21°C (69°F)	292 mm (11.5 inches)	78%	high
November Weather	16°C (62°F)	142 mm (5.6 inches)	74%	moderate
December Weather	11°C (53°F)	114 mm (4.5 inches)	72%	moderate