Marblemount, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marblemount, a community in Skagit County, Washington.
Tonight
50°F
Partly Cloudy
Partly cloudy, with a low around 50. Northeast wind around 1 mph.
7-day forecast for Marblemount
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Partly Cloudy | 1 mph NE | 0% |
| Saturday | 80°F | Mostly Sunny | 0 to 3 mph SSE | 0% |
| Saturday Night | 50°F | Mostly Clear | 2 mph SE | 0% |
| Sunday | 83°F | Sunny | 3 mph W | 0% |
| Sunday Night | 49°F | Mostly Clear | 2 mph S | 0% |
| Monday | 77°F | Sunny | 0 to 6 mph SW | 1% |
| Monday Night | 48°F | Partly Cloudy | 0 to 6 mph N | 1% |
| Tuesday | 72°F | Mostly Sunny | 0 to 6 mph WNW | 1% |
| Tuesday Night | 46°F | Partly Cloudy | 0 to 6 mph S | 3% |
| Wednesday | 71°F | Mostly Sunny | 0 to 5 mph WNW | 8% |
| Wednesday Night | 47°F | Partly Cloudy | 3 mph ENE | 10% |
| Thursday | 74°F | Mostly Sunny then Slight Chance Light Rain | 3 mph WNW | 20% |
| Thursday Night | 48°F | Chance Light Rain | 1 to 5 mph SW | 37% |
| Friday | 68°F | Chance Light Rain | 1 to 5 mph SSW | 37% |
Forecast source: National Weather Service (api.weather.gov) for Marblemount (48.542, -121.440). Updated through the day.
Growing snapshot for Marblemount
Last spring frost
Apr 16
First fall frost
Oct 25
Growing season
192 days
Hardiness zone
7a
More local growing data for Marblemount: nearby ZIP 98267 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Darrington 21 Nne, Wa (13.3 mi from Marblemount). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.