Kennewick, WA Weather & Growing Conditions
Overnight
36°F
Mostly Clear
Mostly clear. Low around 36, with temperatures rising to around 39 overnight. Southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 36°F | Mostly Clear | 3 mph SW | 1% |
| Wednesday | 54°F | Patchy Fog then Sunny | 3 mph S | 1% |
| Wednesday Night | 41°F | Chance Rain Showers | 2 to 10 mph SW | 40% |
| Thursday | 59°F | Mostly Sunny | 5 to 10 mph SW | 13% |
| Thursday Night | 39°F | Partly Cloudy | 1 to 5 mph S | 3% |
| Friday | 56°F | Mostly Cloudy | 1 to 5 mph S | 3% |
| Friday Night | 41°F | Mostly Cloudy | 1 to 5 mph SW | 3% |
| Saturday | 57°F | Mostly Sunny | 1 to 5 mph N | 1% |
| Saturday Night | 42°F | Mostly Cloudy | 2 to 12 mph W | 4% |
| Sunday | 60°F | Partly Sunny | 6 to 13 mph SW | 4% |
| Sunday Night | 41°F | Mostly Cloudy | 2 to 6 mph W | 1% |
| Monday | 55°F | Partly Sunny | 3 mph NW | 5% |
| Monday Night | 41°F | Slight Chance Rain Showers | 2 mph SW | 15% |
| Tuesday | 59°F | Slight Chance Rain Showers | 3 mph SW | 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 (8.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.