WinterOff season ~49°F highs

Things to do in Kennewick in December

December is off season (quieter, and often cheaper) to visit Kennewick, with average highs around 49°F. Museums and indoor sights come into their own, with fewer crowds outside.

Plan a December weekend Where else in December

Best picks for December

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

1Indoor escape

B Reactor Building

decommissioned nuclear reactor at the Hanford Site in Washington, United States

Palouse Falls

waterfall on the Palouse River in Washington, USA

3Indoor escape

Holidays in December 2026

Christmas Day · Fri, Dec 25

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

Kennewick in December: quick answers

Is December a good time to visit Kennewick?

December is off season (quieter, and often cheaper) to visit Kennewick, with average highs around 49°F. Museums and indoor sights come into their own, with fewer crowds outside.

What is the weather like in Kennewick in December?

Average daytime highs are around 49°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 December?

Top picks for December: B Reactor Building, Palouse Falls, REACH Museum, Umatilla National Forest, Hanford Reach National Monument.