Prosser, WA has a temperate climate that is typical of the inland Pacific Northwest. Summers are warm and dry with temperatures generally reaching in the mid-80's (F). Winters are cool and wet with temperatures typically not dropping below freezing for long periods of time. The area receives an average annual precipitation of 10 inches spread out over an average of 77 days throughout the year. This precipitation generally comes in the form of rain rather than snow.
Prosser, Washington gets 9 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Prosser averages 6 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 190 sunny days per year in Prosser. The US average is 205 sunny days.
Prosser gets some kind of precipitation, on average, 68 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 89 degrees
Winter Low: the January low is 27
Rain: averages 9 inches of rain a year
Snow: averages 6 inches of snow a year