March Weather in Walnut, United States

Last updated: June 24, 2025

The average temperature in Walnut, United States during March is a cool 4°C (40°F), with minimums dipping as low as -21°C (-5°F) and maximums soaring to 25°C (78°F). Expect about 86 mm (3.4 in) of precipitation spread over roughly 10 days, contributing to an average humidity of 73%. Ideal for those who enjoy a brisk atmosphere!

March Temperature in Walnut

In March in Walnut, the average temperature is 4°C (40°F). Maximum temperatures can reach 25°C (78°F), while the minimum can drop as low as -21°C (-5°F). Be prepared for a wide range of temperatures when traveling during this month.

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

The chart illustrates March temperature patterns in Walnut, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Walnut, March typically has an average temperature of 4°C (40°F), with highs reaching up to 25°C (78°F) and lows dropping to around -21°C (-5°F).

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

March Precipitation in Walnut

In Walnut in March, the precipitation amount is 86 mm (3.4 in) over the course of 10 days.

March Precipitation Trends in Walnut

The chart displays monthly precipitation patterns in Walnut, 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 Walnut, March typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 10 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 Walnut

In Walnut in March humidity is 73%. With an average temperature of 4°C (40°F), this humidity feels like a chilly mist clinging to your skin, making travel feel damp and invigorating, yet slightly uncomfortable.

March Average Humidity in Walnut

This chart illustrates the average monthly humidity levels in Walnut, 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 Walnut is approximately 73%, 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 Walnut

In Walnut in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Walnut, you can refer to this Hourly UV Index in Walnut.

Maximum UV Index Levels in Walnut for March

The chart shows the monthly maximum UV Index (UVI) for Walnut 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 Walnut typically reaches 6, which falls under the high exposure category.

Data source: Walnut 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 Walnut Compares to Other Months

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

This table compares monthly weather conditions in Walnut, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (24°F)	30 mm (1.2 inches)	76%	moderate
February Weather	-4°C (24°F)	36 mm (1.4 inches)	80%	moderate
March Weather	4°C (40°F)	86 mm (3.4 inches)	73%	high
April Weather	9°C (49°F)	57 mm (2.3 inches)	74%	very high
May Weather	17°C (62°F)	157 mm (6.2 inches)	78%	very high
June Weather	24°C (75°F)	109 mm (4.3 inches)	82%	extreme
July Weather	25°C (77°F)	68 mm (2.7 inches)	83%	very high
August Weather	23°C (74°F)	108 mm (4.3 inches)	80%	very high
September Weather	20°C (69°F)	98 mm (3.8 inches)	75%	very high
October Weather	11°C (52°F)	128 mm (5.0 inches)	75%	high
November Weather	4°C (39°F)	34 mm (1.3 inches)	82%	moderate
December Weather	-1°C (31°F)	36 mm (1.4 inches)	83%	moderate