Santiago, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Santiago, a community in Grays Harbor County, Washington.
This Afternoon
64°F
Partly Sunny
Partly sunny. High near 64, with temperatures falling to around 62 in the afternoon. West wind 2 to 6 mph.
7-day forecast for Santiago
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Partly Sunny | 2 to 6 mph W | 0% |
| Tonight | 52°F | Partly Cloudy | 5 mph NNW | 0% |
| Sunday | 64°F | Mostly Sunny | 5 to 8 mph NNW | 0% |
| Sunday Night | 53°F | Partly Cloudy | 8 mph NNW | 0% |
| Monday | 66°F | Partly Sunny | 5 to 8 mph NW | 0% |
| Monday Night | 53°F | Mostly Cloudy | 8 mph NNW | 0% |
| Tuesday | 64°F | Mostly Sunny | 7 mph NNW | 2% |
| Tuesday Night | 52°F | Mostly Cloudy then Chance Light Rain | 2 to 6 mph NW | 42% |
| Wednesday | 62°F | Chance Light Rain | 5 mph W | 42% |
| Wednesday Night | 51°F | Mostly Cloudy | 5 mph NNW | 11% |
| Thursday | 62°F | Mostly Cloudy | 2 to 7 mph N | 11% |
| Thursday Night | 50°F | Mostly Cloudy then Slight Chance Light Rain | 3 to 7 mph NNW | 21% |
| Friday | 62°F | Slight Chance Light Rain | 3 to 7 mph NNW | 21% |
| Friday Night | 48°F | Mostly Cloudy | 2 to 7 mph N | 13% |
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 Sep 19, 2026.