Tumwater, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Tumwater, a city in Thurston County, Washington.
Overnight
53°F
Mostly Clear
Mostly clear, with a low around 53. North wind around 2 mph.
7-day forecast for Tumwater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Mostly Clear | 2 mph N | 0% |
| Tuesday | 91°F | Sunny then Areas Of Smoke | 2 to 8 mph NNE | 0% |
| Tuesday Night | 58°F | Areas Of Smoke | 1 to 7 mph NNE | 0% |
| Wednesday | 96°F | Areas Of Smoke | 2 to 7 mph NNE | 0% |
| Wednesday Night | 58°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Thursday | 94°F | Sunny | 0 to 7 mph WNW | 0% |
| Thursday Night | 57°F | Mostly Clear | 2 to 7 mph WSW | 0% |
| Friday | 89°F | Sunny | 2 to 8 mph WSW | 0% |
| Friday Night | 55°F | Mostly Clear | 1 to 8 mph WSW | 0% |
| Saturday | 84°F | Sunny | 1 to 10 mph WSW | 0% |
| Saturday Night | 52°F | Partly Cloudy | 2 to 10 mph WSW | 0% |
| Sunday | 80°F | Mostly Sunny | 2 to 9 mph WSW | 0% |
| Sunday Night | 52°F | Mostly Clear | 1 to 9 mph WSW | 0% |
| Monday | 80°F | Mostly Sunny | 1 to 8 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Tumwater (46.989, -122.917). Updated through the day.
Growing snapshot for Tumwater
Last spring frost
Apr 29
First fall frost
Oct 14
Growing season
169 days
Hardiness zone
8a
More local growing data for Tumwater: nearby ZIP 98501 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Olympia Ap, Wa (1.3 mi from Tumwater). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.