Climate in Walnut Creek, California

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.

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Weather Highlights

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

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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.

June, September and May are the most pleasant months in Walnut Creek, while January and December are the least comfortable months.

July is the hottest month for Walnut Creek with an average high temperature of 85.8°, which ranks it as cooler than most places in California. In Walnut Creek, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Walnut Creek are May, October and June.

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In Walnut Creek, there are 36.5 days annually when the high temperature is over 90°, which is about average compared to other places in California.

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January has the coldest nighttime temperatures for Walnut Creek with an average of 39.5°. This is warmer than most places in California.

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In Walnut Creek, there are 9.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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In Walnut Creek, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.

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Humidity in Walnut Creek is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are August, July and June.

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February is the wettest month in Walnut Creek with 3.9 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 58% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 19.6 inches in Walnut Creek means that it is about average compared to other places in California.

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December is the rainiest month in Walnut Creek with 11.1 days of rain, and July is the driest month with only 0.1 rainy days. There are 62.2 rainy days annually in Walnut Creek, which is rainier than most places in California. The rainiest season is Spring when it rains 52% of the time and the driest is Autumn with only a 2% chance of a rainy day.

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There is rarely any recorded snowfall in Walnut Creek, ranking it as one of the least snowy places in California. Any measurable snowfall is a rare occurance in Walnut Creek.

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