Silverthorne, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Silverthorne, a town in Summit County, Colorado.
This Afternoon
47°F
Sunny
Sunny. High near 47, with temperatures falling to around 40 in the afternoon. Northwest wind 2 to 6 mph.
7-day forecast for Silverthorne
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 47°F | Sunny | 2 to 6 mph NW | 0% |
| Tonight | 18°F | Mostly Clear | 3 mph S | 0% |
| Wednesday | 52°F | Snow Showers Likely | 1 to 5 mph ESE | 65% |
| Wednesday Night | 20°F | Snow Showers then Mostly Cloudy | 5 mph NNE | 79% |
| Thursday | 53°F | Sunny | 2 mph NW | 1% |
| Thursday Night | 20°F | Partly Cloudy | 5 mph S | 5% |
| Friday | 50°F | Chance Snow Showers | 5 mph W | 26% |
| Friday Night | 18°F | Chance Snow Showers | 3 mph W | 26% |
| Saturday | 53°F | Sunny | 3 mph W | 6% |
| Saturday Night | 19°F | Clear | 1 to 5 mph SW | 2% |
| Sunday | 60°F | Sunny | 1 to 5 mph WSW | 0% |
| Sunday Night | 23°F | Mostly Clear | 5 mph WSW | 0% |
| Monday | 61°F | Mostly Sunny | 3 mph WNW | 1% |
| Monday Night | 25°F | Partly Cloudy | 5 mph SW | 1% |
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.