Tumwater, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Tumwater, a city in Thurston County, Washington.
Overnight
36°F
Patchy Fog
Patchy fog. Partly cloudy, with a low around 36. South southwest wind around 1 mph.
7-day forecast for Tumwater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 36°F | Patchy Fog | 1 mph SSW | 1% |
| Wednesday | 58°F | Patchy Fog then Light Rain | 1 to 10 mph SSW | 86% |
| Wednesday Night | 44°F | Light Rain | 8 to 15 mph SSW | 94% |
| Thursday | 58°F | Partly Sunny | 9 mph SSW | 14% |
| Thursday Night | 43°F | Light Rain | 6 to 10 mph S | 81% |
| Friday | 55°F | Light Rain | 7 to 18 mph S | 82% |
| Friday Night | 45°F | Light Rain Likely | 0 to 7 mph S | 70% |
| Saturday | 63°F | Mostly Cloudy then Chance Light Rain | 1 to 6 mph S | 41% |
| Saturday Night | 48°F | Light Rain | 6 to 16 mph SSW | 82% |
| Sunday | 56°F | Light Rain Likely | 3 to 12 mph SSW | 57% |
| Sunday Night | 40°F | Slight Chance Light Rain | 0 to 3 mph SW | 15% |
| Monday | 57°F | Chance Light Rain | 0 to 5 mph ESE | 40% |
| Monday Night | 44°F | Light Rain Likely | 5 to 10 mph S | 58% |
| Tuesday | 58°F | Light Rain Likely | 8 to 14 mph S | 58% |
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 Nov 4, 2026.