Sumner, WA enjoys a mild climate year-round with warm summers and cool winters. The average temperature in the summer is in the mid 70s Fahrenheit with occasional heat waves that can push temperatures into the upper 80s and low 90s. In the winter, temperatures usually stay above freezing and tend to hover around the mid 40s. Precipitation is fairly evenly distributed throughout the year, with spring typically being the wettest season. Snowfall is rare in Sumner, though it does occasionally occur during colder weather spells. Overall, Sumner has a pleasant climate that's great for outdoor activities all year round.
Sumner, Washington gets 49 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Sumner averages 5 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 141 sunny days per year in Sumner. The US average is 205 sunny days.
Sumner gets some kind of precipitation, on average, 172 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 76 degrees
Winter Low: the January low is 35
Rain: averages 49 inches of rain a year
Snow: averages 5 inches of snow a year