Santiago, WA Weather & Growing Conditions
Tonight
50°F
Partly Cloudy
Partly cloudy, with a low around 50. Northwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Partly Cloudy | 2 mph NW | 0% |
| Sunday | 66°F | Mostly Sunny | 2 to 6 mph NW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 5 mph NW | 0% |
| Monday | 68°F | Partly Sunny | 2 to 6 mph NW | 0% |
| Monday Night | 52°F | Mostly Cloudy | 2 to 6 mph NW | 0% |
| Tuesday | 65°F | Mostly Sunny | 5 mph NW | 2% |
| Tuesday Night | 50°F | Slight Chance Light Rain | 0 to 3 mph WNW | 22% |
| Wednesday | 62°F | Slight Chance Light Rain then Partly Sunny | 0 to 5 mph NW | 22% |
| Wednesday Night | 47°F | Mostly Cloudy | 1 to 5 mph N | 5% |
| Thursday | 63°F | Mostly Cloudy then Chance Light Rain | 0 to 3 mph N | 32% |
| Thursday Night | 50°F | Chance Light Rain | 3 mph NNE | 41% |
| Friday | 61°F | Chance Light Rain | 5 mph SW | 41% |
| Friday Night | 47°F | Chance Light Rain then Partly Cloudy | 1 to 5 mph NW | 25% |
| Saturday | 62°F | Mostly Sunny | 0 to 3 mph NW | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Santiago, WA
Last spring frost
Apr 26
First fall frost
Oct 22
Growing season
180 days
Hardiness zone
8b
Explore more for Santiago, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Humptulips Salmon Hatchery, Wa (9.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.