Dayton, WA (99328) has a mild climate throughout the year with warm summers and cool winters. The average summer temperature is around 75°F, while the winter averages 40°F. Rainfall is fairly consistent throughout the year, though more rainfall is seen in the late fall and winter months than in the summer months. On average, Dayton sees about 30-40 inches of precipitation each year. The area also experiences dry spells in between rainstorms that bring beautiful sunshine into the area for days on end.
Dayton (zip 99328), Washington gets 16 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Dayton (zip 99328) averages 15 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 176 sunny days per year in Dayton (zip 99328). The US average is 205 sunny days.
Dayton (zip 99328) gets some kind of precipitation, on average, 107 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 26
Rain: averages 16 inches of rain a year
Snow: averages 15 inches of snow a year