Kennewick, WA Weather & Growing Conditions
Overnight
37°F
Patchy Fog
Patchy fog after 1am. Mostly clear. Low around 37, with temperatures rising to around 39 overnight. Southeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 37°F | Patchy Fog | 2 mph SE | 1% |
| Wednesday | 53°F | Patchy Fog then Sunny | 2 mph S | 1% |
| Wednesday Night | 41°F | Chance Rain Showers | 5 mph S | 41% |
| Thursday | 59°F | Slight Chance Rain Showers then Mostly Sunny | 7 mph SW | 16% |
| Thursday Night | 39°F | Partly Cloudy | 0 to 5 mph S | 3% |
| Friday | 56°F | Mostly Cloudy | 0 to 3 mph S | 3% |
| Friday Night | 41°F | Mostly Cloudy | 0 to 3 mph SW | 3% |
| Saturday | 57°F | Mostly Sunny | 0 to 3 mph N | 1% |
| Saturday Night | 42°F | Mostly Cloudy | 1 to 6 mph SW | 3% |
| Sunday | 60°F | Mostly Cloudy | 6 to 9 mph SW | 3% |
| Sunday Night | 41°F | Mostly Cloudy | 1 to 6 mph SW | 2% |
| Monday | 54°F | Partly Sunny | 2 mph NW | 5% |
| Monday Night | 41°F | Slight Chance Rain Showers | 2 mph SW | 15% |
| Tuesday | 59°F | Slight Chance Rain Showers | 3 mph S | 15% |
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 Nov 4, 2026.