Silverthorne, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Silverthorne, a town in Summit County, Colorado.
Overnight
19°F
Partly Cloudy
Partly cloudy, with a low around 19. South southeast wind around 3 mph.
7-day forecast for Silverthorne
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 19°F | Partly Cloudy | 3 mph SSE | 0% |
| Wednesday | 52°F | Chance Snow Showers | 1 to 5 mph NNE | 73% |
| Wednesday Night | 21°F | Snow Showers | 5 mph N | 77% |
| Thursday | 52°F | Sunny | 2 mph SSE | 0% |
| Thursday Night | 22°F | Mostly Cloudy | 2 to 6 mph S | 3% |
| Friday | 51°F | Chance Snow Showers | 3 mph W | 27% |
| Friday Night | 19°F | Chance Snow Showers then Partly Cloudy | 3 mph W | 25% |
| Saturday | 53°F | Sunny | 3 mph WNW | 3% |
| Saturday Night | 21°F | Mostly Clear | 1 to 5 mph SSW | 0% |
| Sunday | 59°F | Sunny | 1 to 5 mph WSW | 0% |
| Sunday Night | 24°F | Mostly Clear | 3 mph SW | 0% |
| Monday | 60°F | Sunny | 2 mph W | 0% |
| Monday Night | 26°F | Partly Cloudy | 3 mph S | 0% |
| Tuesday | 57°F | Mostly Sunny | 5 mph SW | 3% |
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 Nov 4, 2026.