Rainier, WA Weather & Growing Conditions
Tonight
48°F
Partly Cloudy
Partly cloudy, with a low around 48. West southwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Partly Cloudy | 2 mph WSW | 0% |
| Saturday | 76°F | Partly Sunny | 2 mph NW | 0% |
| Saturday Night | 50°F | Partly Cloudy | 1 mph N | 0% |
| Sunday | 76°F | Mostly Sunny | 0 to 3 mph N | 0% |
| Sunday Night | 49°F | Mostly Clear | 2 mph N | 0% |
| Monday | 74°F | Mostly Sunny | 0 to 3 mph WNW | 0% |
| Monday Night | 50°F | Partly Cloudy | 0 to 3 mph WNW | 0% |
| Tuesday | 71°F | Partly Sunny | 0 to 3 mph WNW | 1% |
| Tuesday Night | 48°F | Partly Cloudy | 3 mph SW | 1% |
| Wednesday | 70°F | Mostly Sunny | 3 mph WSW | 3% |
| Wednesday Night | 50°F | Partly Cloudy | 0 to 3 mph NNE | 4% |
| Thursday | 72°F | Partly Sunny | 0 to 3 mph NNW | 13% |
| Thursday Night | 51°F | Chance Light Rain | 3 mph WSW | 26% |
| Friday | 68°F | Slight Chance Light Rain | 2 to 7 mph WSW | 22% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rainier, WA
Last spring frost
Apr 29
First fall frost
Oct 14
Growing season
169 days
Hardiness zone
8b
Explore more for Rainier, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Olympia Ap, Wa (14.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.