Hillsborough, CA typically has a mild climate all year round. During the summer months, temperatures range from the high-60s to mid-70s Fahrenheit, making it an ideal place for outdoor activities like hiking and swimming. Winters are usually cool with little to no snowfall. The average annual rainfall is 17 inches, making it a great place for light gardening or relaxing in the sunshine. Overall, Hillsborough has a pleasant climate that makes it inviting all year long.
Hillsborough, California gets 23 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Hillsborough averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 260 sunny days per year in Hillsborough. The US average is 205 sunny days.
Hillsborough gets some kind of precipitation, on average, 81 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 73 degrees
Winter Low: the January low is 42
Rain: averages 23 inches of rain a year
Snow: averages 0 inches of snow a year