March Weather in Walnut, United States

Last updated: June 24, 2025

In March, the average temperature in Walnut, United States hovers around 4°C (40°F). Be prepared for a chilly range; temperatures can dip as low as -20°C (-3°F) or soar up to 25°C (78°F). Expect about 94 mm (3.7 in) of precipitation over 11 days, contributing to an average humidity of 84%. Stay warm and dry during your visit!

March Temperature in Walnut

In March in Walnut, the average temperature is 4°C (40°F), with maximums reaching 25°C (78°F) and minimums dropping as low as -20°C (-3°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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 -20°C (-3°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 94 mm (3.7 in) over the course of 11 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 94 mm (3.7 inches) of precipitation spread over approximately 11 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 84%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and requiring extra layers to stay warm and dry while traveling.

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 84%, 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	-4°C (25°F)	58 mm (2.3 inches)	82%	moderate
February Weather	-3°C (27°F)	62 mm (2.5 inches)	83%	moderate
March Weather	4°C (40°F)	94 mm (3.7 inches)	84%	high
April Weather	10°C (49°F)	114 mm (4.5 inches)	85%	very high
May Weather	17°C (62°F)	173 mm (6.8 inches)	79%	very high
June Weather	23°C (73°F)	146 mm (5.7 inches)	82%	very high
July Weather	24°C (76°F)	100 mm (3.9 inches)	80%	very high
August Weather	23°C (74°F)	68 mm (2.7 inches)	81%	very high
September Weather	20°C (69°F)	110 mm (4.3 inches)	80%	very high
October Weather	12°C (55°F)	127 mm (5.0 inches)	82%	high
November Weather	4°C (39°F)	55 mm (2.2 inches)	88%	moderate
December Weather	0°C (33°F)	49 mm (1.9 inches)	84%	low