Jefferson, WA County has a temperate climate with mild winters and warm summers. Rainfall is relatively heavy, averaging nearly 80 inches annually. During the summer months, temperatures typically range between 60-80°F and in the winter months between 30-50°F. The area is considered fairly humid, with humidity levels ranging from 70 to 90 percent year round. The area experiences frequent rain showers throughout the year but very little snowfall, making it an ideal place for outdoor activities like hiking and camping.
Jefferson County, Washington gets 27 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Jefferson County averages 2 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 159 sunny days per year in Jefferson County. The US average is 205 sunny days.
Jefferson County gets some kind of precipitation, on average, 143 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 35
Rain: averages 27 inches of rain a year
Snow: averages 2 inches of snow a year