Typical Weather in Kennewick, WA in September

80° F Avg High

53° F Avg Low

1 Rainy Days

☀️ Temperature Summary

September is a popular time to visit, with an inviting climate featuring warm temperatures. September is one of the warmer months of the year for Kennewick, with highs averaging around 80°F. You can expect overnight lows near 53°F most days. Daily high temperatures can range between 86°F and 73°F for the month of September.

The warm, dry temperatures in September make Kennewick a great destination to relax and soak up the sun.

High Temps Throughout the Year

☔ Rain Summary

You can expect about a 3% chance of rain for any given day in September. It's one of the drier months of the year for Kennewick, with total rainfall for the month around 0 inches.