March Weather in Iwanai, Japan

Last updated: August 23, 2025

In March, the average temperature in Iwanai, Japan hovers around 1°C (34°F). Expect chilly nights with a minimum of -8°C (18°F), while days can warm up to a maximum of 13°C (55°F). Be prepared for 16 days of rain, accumulating to 98 mm (3.8 in), and feel the humidity, averaging a brisk 81%.

March Temperature in Iwanai

In March in Iwanai, the average temperature is 1°C (34°F). Maximums can reach 13°C (55°F), while minimums can drop as low as -8°C (18°F). Be sure to pack warm clothing and prepare for chilly weather when traveling during this time.

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

The chart illustrates March temperature patterns in Iwanai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iwanai, March typically has an average temperature of 1°C (34°F), with highs reaching up to 13°C (55°F) and lows dropping to around -8°C (18°F).

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

March Precipitation in Iwanai

In Iwanai in March, the precipitation amount is 98 mm (3.8 in) over the course of 16 days.

March Precipitation Trends in Iwanai

The chart displays monthly precipitation patterns in Iwanai, 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 Iwanai, March typically receives around 98 mm (3.8 inches) of precipitation spread over approximately 16 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 Iwanai

In Iwanai in March humidity is 81%. With an average temperature of 1°C (34°F), this humidity feels like a damp chill wrapping around you, making traveling uncomfortable as every breath feels heavy and the cold penetration intensifies with the moisture in the air.

March Average Humidity in Iwanai

This chart illustrates the average monthly humidity levels in Iwanai, 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 Iwanai is approximately 81%, 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 Iwanai

In Iwanai in March, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Iwanai.

Maximum UV Index Levels in Iwanai for March

The chart shows the monthly maximum UV Index (UVI) for Iwanai 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 Iwanai typically reaches 5, which falls under the moderate exposure category.

Data source: Iwanai 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 Iwanai Compares to Other Months

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

This table compares monthly weather conditions in Iwanai, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	99 mm (3.9 inches)	84%	low
February Weather	-3°C (26°F)	103 mm (4.1 inches)	83%	moderate
March Weather	1°C (34°F)	98 mm (3.8 inches)	81%	moderate
April Weather	5°C (41°F)	88 mm (3.4 inches)	81%	high
May Weather	11°C (53°F)	86 mm (3.4 inches)	86%	very high
June Weather	15°C (59°F)	109 mm (4.3 inches)	87%	very high
July Weather	20°C (68°F)	94 mm (3.7 inches)	93%	very high
August Weather	21°C (70°F)	145 mm (5.7 inches)	95%	very high
September Weather	18°C (64°F)	126 mm (5.0 inches)	88%	very high
October Weather	12°C (53°F)	149 mm (5.9 inches)	83%	moderate
November Weather	5°C (41°F)	176 mm (6.9 inches)	79%	moderate
December Weather	-2°C (29°F)	159 mm (6.3 inches)	80%	low