Santiago, WA Weather & Growing Conditions
Overnight
43°F
Mostly Cloudy
Mostly cloudy, with a low around 43. East southeast wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 43°F | Mostly Cloudy | 2 mph ESE | 2% |
| Wednesday | 56°F | Mostly Cloudy then Light Rain | 2 to 7 mph SE | 96% |
| Wednesday Night | 46°F | Light Rain | 2 to 7 mph SSW | 82% |
| Thursday | 56°F | Slight Chance Light Rain | 2 to 6 mph SSE | 19% |
| Thursday Night | 47°F | Rain | 6 to 9 mph SSE | 96% |
| Friday | 55°F | Rain | 3 to 10 mph SSE | 96% |
| Friday Night | 48°F | Light Rain | 5 mph SE | 76% |
| Saturday | 60°F | Light Rain Likely then Showers And Thunderstorms | 5 to 9 mph SE | 90% |
| Saturday Night | 49°F | Showers And Thunderstorms then Light Rain | 6 to 13 mph S | 96% |
| Sunday | 56°F | Light Rain Likely | 0 to 6 mph SSW | 60% |
| Sunday Night | 44°F | Slight Chance Light Rain | 2 mph ESE | 15% |
| Monday | 55°F | Light Rain Likely | 2 to 6 mph ESE | 59% |
| Monday Night | 48°F | Light Rain Likely | 6 to 9 mph SE | 73% |
| Tuesday | 56°F | Light Rain Likely | 7 to 10 mph SSE | 73% |
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 Nov 4, 2026.