San Juan County has a mild, temperate climate. The average temperature range is between the low 50s and mid-70s with very little precipitation throughout the year. Summers are typically dry and sunny, while winters tend to be more damp and cool. Snowfall is infrequent, but when it does occur it generally falls in short bursts during the coldest months of December through February. The area is also known for its pleasant ocean breezes that help to keep temperatures comfortable all year round.
San Juan County, Washington gets 28 inches of rain, on average, per year. The US average is 38 inches of rain per year.
San Juan County averages 6 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 158 sunny days per year in San Juan County. The US average is 205 sunny days.
San Juan County gets some kind of precipitation, on average, 138 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 71 degrees
Winter Low: the January low is 36
Rain: averages 28 inches of rain a year
Snow: averages 6 inches of snow a year