Santiago, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Santiago, a community in Grays Harbor County, Washington.
Overnight
54°F
Mostly Clear
Mostly clear, with a low around 54. Northeast wind around 2 mph.
7-day forecast for Santiago
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Mostly Clear | 2 mph NE | 0% |
| Tuesday | 73°F | Sunny | 1 to 8 mph WNW | 0% |
| Tuesday Night | 57°F | Mostly Clear | 1 to 8 mph N | 0% |
| Wednesday | 73°F | Patchy Smoke | 1 to 7 mph NW | 0% |
| Wednesday Night | 56°F | Partly Cloudy | 2 to 7 mph NW | 0% |
| Thursday | 71°F | Mostly Sunny | 1 to 7 mph NW | 0% |
| Thursday Night | 55°F | Partly Cloudy | 7 mph NW | 0% |
| Friday | 70°F | Mostly Sunny | 3 to 10 mph NW | 0% |
| Friday Night | 56°F | Partly Cloudy | 10 mph NW | 0% |
| Saturday | 67°F | Mostly Sunny | 12 mph NW | 0% |
| Saturday Night | 55°F | Partly Cloudy | 8 to 12 mph NW | 0% |
| Sunday | 65°F | Mostly Sunny | 10 mph NW | 0% |
| Sunday Night | 55°F | Partly Cloudy | 6 to 10 mph NW | 0% |
| Monday | 65°F | Mostly Sunny | 6 to 9 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Santiago (47.299, -124.232). Updated through the day.
Growing snapshot for Santiago
Last spring frost
Apr 26
First fall frost
Oct 22
Growing season
180 days
Hardiness zone
9a
More local growing data for Santiago: nearby ZIP 98562 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Humptulips Salmon Hatchery, Wa (9.9 mi from Santiago). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.