Walnut Creek, CA has a Mediterranean climate with warm, dry summers and mild, wet winters. The average high in the summer is around 84°F (29°C) while the average low is around 55°F (13°C). During winter months, temperatures tend to remain mild with an average high of around 58°F (14.4°C) and an average low of about 38°F (3.3°C). The area typically receives most of its annual rainfall during the winter season, from November to March. Walnut Creek enjoys sunny days throughout the year and experiences mild temperatures all year round.
Walnut Creek, California gets 20 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Walnut Creek averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 262 sunny days per year in Walnut Creek. The US average is 205 sunny days.
Walnut Creek gets some kind of precipitation, on average, 62 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.
Summer High: the July high is around 86 degrees
Winter Low: the January low is 40
Rain: averages 20 inches of rain a year
Snow: averages 0 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Walnut Creek is 8.5 (10=best), which means it is more comfortable than most places in California.
9.3 / 7.3
Summer / Winter
June, September and May are the most pleasant months in Walnut Creek, while January and December are the least comfortable months.