Kennewick, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Kennewick, a city in Benton County, Washington.
Overnight
58°F
Smoke
Smoke. Clear. Low around 58, with temperatures rising to around 61 overnight. Northwest wind around 2 mph.
7-day forecast for Kennewick
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Smoke | 2 mph NW | 0% |
| Tuesday | 90°F | Smoke | 1 to 6 mph N | 0% |
| Tuesday Night | 63°F | Areas Of Smoke | 0 to 6 mph NW | 0% |
| Wednesday | 95°F | Areas Of Smoke | 0 to 5 mph NW | 0% |
| Wednesday Night | 65°F | Areas Of Smoke then Clear | 3 mph SW | 0% |
| Thursday | 100°F | Sunny | 1 to 5 mph SW | 0% |
| Thursday Night | 68°F | Clear | 3 to 9 mph SW | 0% |
| Friday | 98°F | Sunny | 8 mph SW | 0% |
| Friday Night | 67°F | Clear | 8 mph SW | 0% |
| Saturday | 94°F | Sunny | 5 to 8 mph SW | 0% |
| Saturday Night | 66°F | Clear | 8 mph SW | 0% |
| Sunday | 90°F | Sunny | 8 mph SW | 0% |
| Sunday Night | 63°F | Mostly Clear | 5 to 8 mph SW | 0% |
| Monday | 89°F | Sunny | 8 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Kennewick (46.198, -119.176). Updated through the day.
Growing snapshot for Kennewick
Last spring frost
Mar 28
First fall frost
Oct 30
Growing season
216 days
Hardiness zone
7b
More local growing data for Kennewick: nearby ZIP 99336 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Kennewick, Wa (3.6 mi from Kennewick). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.