Santiago, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Santiago, a community in Grays Harbor County, Washington.
Overnight
44°F
Mostly Cloudy
Mostly cloudy, with a low around 44. East southeast wind around 5 mph.
7-day forecast for Santiago
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 44°F | Mostly Cloudy | 5 mph ESE | 2% |
| Wednesday | 56°F | Mostly Cloudy then Light Rain | 6 to 10 mph SSE | 98% |
| Wednesday Night | 47°F | Light Rain | 3 to 10 mph SW | 80% |
| Thursday | 56°F | Partly Sunny then Slight Chance Light Rain | 3 to 8 mph SSE | 20% |
| Thursday Night | 48°F | Rain | 8 to 14 mph SSE | 97% |
| Friday | 56°F | Rain | 6 to 16 mph SSE | 97% |
| Friday Night | 49°F | Light Rain | 5 to 8 mph SE | 76% |
| Saturday | 59°F | Light Rain Likely then Showers And Thunderstorms | 8 to 12 mph SE | 91% |
| Saturday Night | 50°F | Showers And Thunderstorms then Light Rain | 10 to 15 mph S | 96% |
| Sunday | 56°F | Light Rain Likely | 1 to 10 mph SW | 57% |
| Sunday Night | 45°F | Slight Chance Light Rain | 1 to 6 mph SE | 15% |
| Monday | 55°F | Light Rain Likely | 8 mph SE | 60% |
| Monday Night | 49°F | Light Rain Likely | 8 to 14 mph SSE | 73% |
| Tuesday | 56°F | Light Rain Likely | 9 to 15 mph SSE | 73% |
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
Nearby towns & communities
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Hogans Corner
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Humptulips
Malone
Markham
McCleary
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Oakville
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Westport
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 Nov 4, 2026.