Kennewick, WA Weather & Growing Conditions
Tonight
56°F
Mostly Clear
Mostly clear, with a low around 56. South wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Mostly Clear | 2 mph S | 0% |
| Saturday | 81°F | Sunny | 0 to 3 mph SE | 0% |
| Saturday Night | 57°F | Mostly Clear | 2 mph SE | 0% |
| Sunday | 83°F | Sunny | 0 to 3 mph N | 0% |
| Sunday Night | 58°F | Clear | 2 mph N | 0% |
| Monday | 85°F | Sunny | 2 mph W | 0% |
| Monday Night | 58°F | Partly Cloudy | 2 mph SW | 0% |
| Tuesday | 81°F | Sunny | 0 to 3 mph SW | 0% |
| Tuesday Night | 56°F | Partly Cloudy | 3 mph SW | 0% |
| Wednesday | 77°F | Mostly Sunny | 5 mph SW | 0% |
| Wednesday Night | 55°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Thursday | 75°F | Mostly Sunny | 0 to 5 mph NW | 1% |
| Thursday Night | 54°F | Partly Cloudy | 1 to 5 mph W | 5% |
| Friday | 73°F | Partly Sunny | 1 to 6 mph SW | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Kennewick, WA
Last spring frost
Mar 28
First fall frost
Oct 30
Growing season
216 days
Hardiness zone
7b
Explore more for Kennewick, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Kennewick, Wa (3.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.