Tumwater, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Tumwater, a city in Thurston County, Washington.
This Afternoon
75°F
Sunny
Sunny, with a high near 75. North northeast wind around 3 mph.
7-day forecast for Tumwater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 3 mph NNE | 0% |
| Tonight | 47°F | Mostly Clear | 2 mph N | 0% |
| Sunday | 76°F | Mostly Sunny | 0 to 3 mph NNE | 0% |
| Sunday Night | 47°F | Partly Cloudy | 2 mph NNW | 0% |
| Monday | 74°F | Partly Sunny | 0 to 3 mph NW | 0% |
| Monday Night | 49°F | Partly Cloudy | 0 to 3 mph NW | 0% |
| Tuesday | 72°F | Partly Sunny | 0 to 7 mph W | 0% |
| Tuesday Night | 46°F | Partly Cloudy | 2 to 7 mph SW | 6% |
| Wednesday | 69°F | Partly Sunny | 2 to 7 mph SW | 8% |
| Wednesday Night | 46°F | Mostly Cloudy | 0 to 7 mph W | 6% |
| Thursday | 66°F | Mostly Cloudy then Slight Chance Light Rain | 0 to 6 mph NNE | 17% |
| Thursday Night | 47°F | Slight Chance Light Rain | 0 to 5 mph N | 17% |
| Friday | 65°F | Slight Chance Light Rain then Partly Sunny | 0 to 7 mph N | 17% |
| Friday Night | 44°F | Partly Cloudy | 1 to 7 mph E | 8% |
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 Sep 20, 2026.