FallGood time to go ~85°F highs

Things to do in Kennewick in September

September is a good month to visit Kennewick, with average highs around 85°F. Crisp air and changing leaves make parks and viewpoints shine.

Plan a September weekend Where else in September

Best picks for September

What's famous here, weighted toward what shines in September.

1Foliage walks

Umatilla National Forest

national forest in the U.S. states of Oregon and Washington

2Foliage walks

Hanford Reach National Monument

national monument in the United States

3Foliage walks

Whitman Mission National Historic Site

Holidays in September 2027

Labour Day · Mon, Sep 6

Expect busier roads and pricier stays around these dates. See long weekends.

Also great in September in Washington

Seattle Bellingham Vancouver Spokane

Kennewick in September: quick answers

Is September a good time to visit Kennewick?

September is a good month to visit Kennewick, with average highs around 85°F. Crisp air and changing leaves make parks and viewpoints shine.

What is the weather like in Kennewick in September?

Average daytime highs are around 85°F, compared with 94°F in the warmest month. Check the forecast a week out; our planner favors indoor stops on rainy days.

What are the best things to do in Kennewick in September?

Top picks for September: Umatilla National Forest, Hanford Reach National Monument, Whitman Mission National Historic Site, Juniper Dunes Wilderness, Palouse Falls State Park.