Snohomish, WA County has a warm-summer Mediterranean climate with mild and wet winters. Summers are warm with temperatures usually ranging from the mid-60s to mid-70s, while winter temperatures typically stay between the mid-30s and low 40s. The area receives an average of 35 inches of rainfall per year, most of which falls during the winter months. Snowfall is rare but does occur on occasion, especially in the higher elevations. During the summer months, temperatures are often moderated by morning coastal fog that rarely reaches inland areas.
Snohomish County, Washington gets 46 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Snohomish County averages 6 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 162 sunny days per year in Snohomish County. The US average is 205 sunny days.
Snohomish County gets some kind of precipitation, on average, 171 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 75 degrees
Winter Low: the January low is 35
Rain: averages 46 inches of rain a year
Snow: averages 6 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Snohomish County is 7.2 (10=best), which means it is more comfortable than most places in Washington.
9.2 / 5.3
Summer / Winter
August, July and September are the most pleasant months in Snohomish County, while December and January are the least comfortable months.