Chewelah, WA (99109) has a mostly dry climate, with an average of only 14 inches of precipitation annually. Summers are usually warm and sunny, with temperatures reaching into the upper 70s and lows in the 40s. Winters are relatively mild in this region, with average highs in the upper 30s and lows in the 20s. The area is subject to occasional cold spells and some snowfall.
Chewelah (zip 99109), Washington gets 21 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Chewelah (zip 99109) averages 42 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 174 sunny days per year in Chewelah (zip 99109). The US average is 205 sunny days.
Chewelah (zip 99109) gets some kind of precipitation, on average, 106 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 86 degrees
Winter Low: the January low is 21
Rain: averages 21 inches of rain a year
Snow: averages 42 inches of snow a year