Silverthorne, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Silverthorne, a town in Summit County, Colorado.
Overnight
47°F
Patchy Smoke
Patchy smoke. Mostly clear, with a low around 47. South southeast wind around 8 mph.
7-day forecast for Silverthorne
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Patchy Smoke | 8 mph SSE | 0% |
| Tuesday | 83°F | Patchy Smoke | 5 to 14 mph SSW | 12% |
| Tuesday Night | 46°F | Patchy Smoke | 3 to 10 mph SSW | 4% |
| Wednesday | 84°F | Sunny | 3 to 10 mph NW | 0% |
| Wednesday Night | 41°F | Mostly Clear | 2 to 10 mph WSW | 0% |
| Thursday | 85°F | Sunny | 2 to 8 mph W | 0% |
| Thursday Night | 45°F | Clear | 2 to 8 mph WNW | 0% |
| Friday | 87°F | Sunny | 2 to 6 mph WSW | 0% |
| Friday Night | 46°F | Mostly Clear | 6 mph E | 0% |
| Saturday | 87°F | Sunny | 2 to 7 mph WSW | 1% |
| Saturday Night | 49°F | Partly Cloudy | 5 mph ESE | 0% |
| Sunday | 87°F | Mostly Sunny | 2 to 6 mph WSW | 9% |
| Sunday Night | 49°F | Partly Cloudy | 5 mph SE | 6% |
| Monday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph W | 43% |
Forecast source: National Weather Service (api.weather.gov) for Silverthorne (39.660, -106.089). Updated through the day.
Growing snapshot for Silverthorne
Growing season
41 days
Hardiness zone
5a
More local growing data for Silverthorne: nearby ZIP 80435 weather · frost dates · planting calendar · Colorado frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Dillon 1 E, Co (6.5 mi from Silverthorne). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.