Walla Walla, Washington gets 18 inches of rain, on average, per year. The US average is 39 inches of rain per year.
Walla Walla averages 10 inches of snow per year. The US average is 26 inches of snow per year.
On average, there are 188 sunny days per year in Walla Walla. The US average is 205 sunny days.
Summer High: the July high is around 89 degrees
Winter Low: the January low is 29
Sperling's Comfort Index for Walla Walla is a 76 out of 100
A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 54. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.
YOU SHOULD KNOW
Walla Walla gets some kind of precipitation, on average, 46 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.