Grass Valley, CA has a mild climate with warm summers and cold winters. The average temperature in the summer is in the mid-70s, with occasional days reaching the upper 80s. In the winter months, temperatures tend to stay around 40 degrees Fahrenheit during the day and dip into the 20s at night. The area gets approximately 45 inches of rain each year and plenty of sunshine to complement it, creating a beautiful landscape throughout all four seasons.
Grass Valley, California gets 55 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Grass Valley averages 11 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 243 sunny days per year in Grass Valley. The US average is 205 sunny days.
Grass Valley gets some kind of precipitation, on average, 84 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 87 degrees
Winter Low: the January low is 34
Rain: averages 55 inches of rain a year
Snow: averages 11 inches of snow a year