Rainier, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rainier, a city in Thurston County, Washington.
Tonight
47°F
Partly Cloudy
Partly cloudy, with a low around 47. West southwest wind around 2 mph.
7-day forecast for Rainier
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Partly Cloudy | 2 mph WSW | 0% |
| Saturday | 75°F | Mostly Cloudy | 2 mph NNW | 0% |
| Saturday Night | 48°F | Partly Cloudy | 1 mph N | 0% |
| Sunday | 75°F | Mostly Sunny | 0 to 3 mph N | 0% |
| Sunday Night | 47°F | Mostly Clear | 0 to 3 mph N | 0% |
| Monday | 73°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 3 mph WNW | 1% |
| Tuesday Night | 46°F | Partly Cloudy | 0 to 3 mph SW | 1% |
| Wednesday | 69°F | Mostly Sunny | 0 to 3 mph NW | 3% |
| Wednesday Night | 49°F | Partly Cloudy | 0 to 3 mph N | 5% |
| Thursday | 72°F | Partly Sunny | 0 to 3 mph NNW | 13% |
| Thursday Night | 50°F | Chance Light Rain | 3 mph WSW | 26% |
| Friday | 67°F | Slight Chance Light Rain | 2 to 7 mph WSW | 22% |
Forecast source: National Weather Service (api.weather.gov) for Rainier (46.892, -122.687). Updated through the day.
Growing snapshot for Rainier
Last spring frost
Apr 29
First fall frost
Oct 14
Growing season
169 days
Hardiness zone
8b
More local growing data for Rainier: nearby ZIP 98576 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Olympia Ap, Wa (14.9 mi from Rainier). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.