Historical weather data, all-time temperature records, and monthly climate averages for Kennewick, WA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Kennewick lands right at the sweet spot of spring, with an average high of 64° and low of 40° built from 126 years of records. The date has seen everything from a balmy 83° back in 1952 to a brutal 24° freeze in 1975. Rain is unlikely today — historically there's only a 16% chance of any precipitation.
Kennewick plays for keeps on the extremes — the all-time high of 115° in July 1939 and a bone-chilling -29° in December 1919 represent a jaw-dropping 144-degree swing. A single day in May 2019 dumped over 3 inches of rain, and November 1921 buried the city under 14 inches of snow in one shot.
Kennewick is a summer town at heart, with late July delivering average highs of 93° and a long warm stretch from May through September above 76°. Winters are cold but short — January highs hover around 40° before temperatures rebound quickly through spring. If you're trying to avoid rain, aim for summer; the wettest stretch clusters around the last week of December.