Frost dates for 80497Silverthorne, CO
Frost is possible in any month near Silverthorne, based on NOAA 1991-2020 records for the Dillon 1 E, CO station.
Frost is possible in any month. Even summer nights can drop to freezing at this station, so protect tender plants whenever cold nights are forecast.
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | — | — | 16 days | 100% |
| Frost / freeze (32°F) | — | — | 41 days | 100% |
| Hard freeze (28°F) | Jun 5 · Jun 18 · Jul 6 | Aug 24 · Sep 6 · Sep 19 | 78 days | 100% |
Where these dates come from
ZIP code 80497 is matched to the NOAA station Dillon 1 E, CO, 6.4 km away, at 9,065 ft elevation (289 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Dillon 1 E, CO (used) | 9,065 ft | — | — |
| Vail, CO | 8,305 ft | Jun 21 | Sep 7 |
| Climax, CO | 11,345 ft | — | — |
| Green Mt Dam, CO | 7,741 ft | Jun 6 | Sep 14 |
Frost dates near Silverthorne
- Frisco, CO 80443 · last —, first —
- Dillon, CO 80435 · last —, first —
- Silverthorne, CO 80498 · last —, first —
- Vail, CO 81657 · last Jun 21, first Sep 7
- Breckenridge, CO 80424 · last Jun 6, first Sep 19
- Red Cliff, CO 81649 · last Jun 21, first Sep 7
- Minturn, CO 81645 · last Jun 21, first Sep 7
- Silver Plume, CO 80476 · last Jun 6, first Sep 19
Frequently asked questions
- When is the last frost in Silverthorne, CO?
- Frost is possible in any month at the nearest NOAA station (Dillon 1 E, CO), so there is no reliable average last frost date.
- When is the first frost in Silverthorne, CO?
- Frost is possible in any month at the nearest NOAA station.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.