March Weather in Iiyama, Japan

Last updated: August 23, 2025

In March, the average temperature in Iiyama, Japan hovers around 4°C (39°F), with potential extremes ranging from a chilly -9°C (16°F) to a pleasant 21°C (70°F). Expect 133 mm (5.2 in) of precipitation spread over 18 days, contributing to a high average humidity of 81%. Stay prepared for a mix of cool weather and wet conditions!

March Temperature in Iiyama

In March in Iiyama, the average temperature is 4°C (39°F), with maximums reaching up to 21°C (70°F) and minimums dropping as low as -9°C (16°F). This variability makes it essential for travelers to pack layers to prepare for varying weather conditions.

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

The chart illustrates March temperature patterns in Iiyama, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iiyama, March typically has an average temperature of 4°C (39°F), with highs reaching up to 21°C (70°F) and lows dropping to around -9°C (16°F).

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

March Precipitation in Iiyama

In Iiyama in March, the precipitation amount is 133 mm (5.2 in) over a span of 18 days.

March Precipitation Trends in Iiyama

The chart displays monthly precipitation patterns in Iiyama, 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 Iiyama, March typically receives around 133 mm (5.2 inches) of precipitation spread over approximately 18 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in Iiyama

In Iiyama in March, humidity is 81%. With an average temperature of 4°C (39°F), this humidity feels like a chilling dampness that penetrates even the warmest layers of clothing, making outdoor exploration uncomfortable and prompting travelers to seek refuge indoors.

March Average Humidity in Iiyama

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

In Iiyama in March, 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 Iiyama.

Maximum UV Index Levels in Iiyama for March

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

Data source: Iiyama 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 Iiyama Compares to Other Months

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

This table compares monthly weather conditions in Iiyama, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	144 mm (5.7 inches)	88%	moderate
February Weather	-1°C (30°F)	129 mm (5.1 inches)	86%	high
March Weather	4°C (39°F)	133 mm (5.2 inches)	81%	very high
April Weather	9°C (48°F)	141 mm (5.5 inches)	78%	very high
May Weather	15°C (59°F)	160 mm (6.3 inches)	81%	extreme
June Weather	18°C (65°F)	171 mm (6.7 inches)	88%	extreme
July Weather	22°C (73°F)	341 mm (13.4 inches)	92%	extreme
August Weather	24°C (75°F)	198 mm (7.8 inches)	92%	extreme
September Weather	19°C (67°F)	194 mm (7.6 inches)	89%	very high
October Weather	13°C (56°F)	217 mm (8.5 inches)	87%	high
November Weather	7°C (44°F)	94 mm (3.7 inches)	85%	moderate
December Weather	1°C (34°F)	151 mm (6.0 inches)	86%	moderate