Tumwater, WA Weather & Growing Conditions
Tonight
47°F
Partly Cloudy
Partly cloudy, with a low around 47. West northwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Partly Cloudy | 2 mph WNW | 0% |
| Saturday | 77°F | Partly Sunny | 2 mph E | 1% |
| Saturday Night | 47°F | Partly Cloudy | 1 mph NNE | 0% |
| Sunday | 78°F | Mostly Sunny | 2 mph N | 0% |
| Sunday Night | 47°F | Mostly Clear | 2 mph N | 0% |
| Monday | 75°F | Mostly Sunny | 0 to 3 mph WNW | 0% |
| Monday Night | 48°F | Partly Cloudy | 0 to 3 mph NW | 0% |
| Tuesday | 71°F | Partly Sunny | 0 to 5 mph WNW | 1% |
| Tuesday Night | 46°F | Partly Cloudy | 0 to 5 mph WSW | 1% |
| Wednesday | 70°F | Partly Sunny | 2 mph NNW | 2% |
| Wednesday Night | 48°F | Partly Cloudy | 2 mph NNW | 6% |
| Thursday | 72°F | Partly Sunny | 0 to 3 mph NNW | 11% |
| Thursday Night | 48°F | Slight Chance Light Rain | 3 mph W | 22% |
| Friday | 68°F | Slight Chance Light Rain | 1 to 6 mph WSW | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Tumwater, WA
Last spring frost
Apr 29
First fall frost
Oct 14
Growing season
169 days
Hardiness zone
8a
Explore more for Tumwater, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Olympia Ap, Wa (7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.