March Weather in Grass Valley, United States

Last updated: June 24, 2025

In March, the average temperature in Grass Valley, United States hovers around 9°C (48°F). Expect a chilly minimum of -6°C (21°F), while the mercury can rise to a comfortable 27°C (81°F). During this period, expect 267 mm (10.5 in) of precipitation spread across approximately 15 days, contributing to an average humidity of 83%.

March Temperature in Grass Valley

In March in Grass Valley, the average temperature is 9°C (48°F). Maximums can reach 27°C (81°F) and minimums can be as low as -6°C (21°F). Be prepared for a wide range of temperatures, making it essential to pack both warm and light clothing for your trip.

March Weather in Grass Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Grass Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grass Valley, March typically has an average temperature of 9°C (48°F), with highs reaching up to 27°C (81°F) and lows dropping to around -6°C (21°F).

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

March Precipitation in Grass Valley

In Grass Valley in March, the total precipitation amount is 267 mm (10.5 in) spread over 15 days.

March Precipitation Trends in Grass Valley

The chart displays monthly precipitation patterns in Grass Valley, 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 Grass Valley, March typically receives around 267 mm (10.5 inches) of precipitation spread over approximately 15 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 Grass Valley

In Grass Valley in March humidity is 83%. With an average temperature of 9°C (48°F), this humidity feels like an enveloping blanket, making outdoor activities quite uncomfortable and encouraging travelers to seek shelter or shade frequently.

March Average Humidity in Grass Valley

This chart illustrates the average monthly humidity levels in Grass Valley, 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 Grass Valley is approximately 83%, 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 Grass Valley

In Grass Valley in March, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Grass Valley.

Maximum UV Index Levels in Grass Valley for March

The chart shows the monthly maximum UV Index (UVI) for Grass Valley 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 Grass Valley typically reaches 7, which falls under the high exposure category.

Data source: Grass Valley 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 Grass Valley Compares to Other Months

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

This table compares monthly weather conditions in Grass Valley, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	269 mm (10.6 inches)	84%	moderate
February Weather	8°C (46°F)	279 mm (11.0 inches)	84%	moderate
March Weather	9°C (48°F)	267 mm (10.5 inches)	83%	high
April Weather	13°C (55°F)	129 mm (5.1 inches)	81%	very high
May Weather	17°C (62°F)	76 mm (3.0 inches)	74%	very high
June Weather	22°C (72°F)	13 mm (0.5 inches)	64%	extreme
July Weather	26°C (79°F)	1 mm (0.0 inches)	44%	extreme
August Weather	25°C (77°F)	2 mm (0.1 inches)	36%	very high
September Weather	21°C (70°F)	23 mm (0.9 inches)	44%	very high
October Weather	15°C (60°F)	78 mm (3.1 inches)	65%	high
November Weather	10°C (51°F)	157 mm (6.2 inches)	84%	moderate
December Weather	7°C (44°F)	215 mm (8.4 inches)	83%	moderate