April Weather in Grass Valley, United States

Last updated: June 24, 2025

In April, the average temperature in Grass Valley, United States hovers around 13°C (55°F). Temperature extremes can range from a chilly -3°C (26°F) to a sweltering 30°C (86°F). Expect about 129 mm (5.1 in) of precipitation over 9 days, contributing to an average humidity level of 81%.

April Temperature in Grass Valley

In April in Grass Valley, the average temperature is 13°C (55°F). Maximums can reach 30°C (86°F), and minimums can be as low as -3°C (26°F). Be prepared for a wide range of temperatures while traveling during this month.

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

The chart illustrates April 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, April typically has an average temperature of 13°C (55°F), with highs reaching up to 30°C (86°F) and lows dropping to around -3°C (26°F).

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

April Precipitation in Grass Valley

In Grass Valley in April, the total precipitation amount is 129 mm (5.1 in) over the course of 9 days.

April Precipitation Trends in Grass Valley

The chart displays monthly precipitation patterns in Grass Valley, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Grass Valley, April typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 9 days.

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

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Millimeters (mm) Inches (in)

April Humidity in Grass Valley

In Grass Valley in April, humidity is 81%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket wrapping around you, making strolls outdoors feel heavy and slightly oppressive, which may be less than ideal for travelers looking to explore comfortably.

April Average Humidity in Grass Valley

This chart illustrates the average monthly humidity levels in Grass Valley, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Grass Valley is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Grass Valley

In Grass Valley in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Grass Valley.

Maximum UV Index Levels in Grass Valley for April

The chart shows the monthly maximum UV Index (UVI) for Grass Valley in April, 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 April, the maximum UV index in Grass Valley typically reaches 8, which falls under the very high exposure category.

Data source: Grass Valley April 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 April 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 April’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 April’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