Marblemount, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marblemount, a community in Skagit County, Washington.
Overnight
52°F
Patchy Smoke
Patchy smoke. Clear, with a low around 52. Northeast wind around 2 mph.
7-day forecast for Marblemount
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Patchy Smoke | 2 mph NE | 0% |
| Tuesday | 90°F | Areas Of Smoke | 1 to 5 mph S | 0% |
| Tuesday Night | 56°F | Patchy Smoke | 3 mph NE | 0% |
| Wednesday | 94°F | Smoke | 5 mph NNE | 0% |
| Wednesday Night | 58°F | Clear | 1 to 5 mph SSE | 0% |
| Thursday | 92°F | Sunny | 1 to 5 mph WSW | 0% |
| Thursday Night | 58°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Friday | 89°F | Sunny | 0 to 8 mph SW | 0% |
| Friday Night | 56°F | Mostly Clear | 0 to 8 mph WSW | 0% |
| Saturday | 84°F | Sunny | 0 to 8 mph WSW | 0% |
| Saturday Night | 53°F | Mostly Clear | 0 to 8 mph NW | 1% |
| Sunday | 81°F | Sunny | 0 to 7 mph WSW | 1% |
| Sunday Night | 52°F | Mostly Clear | 0 to 7 mph WNW | 0% |
| Monday | 81°F | Sunny | 0 to 7 mph WNW | 2% |
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 Aug 4, 2026.