Frost dates for 80816Florissant, CO
Frost is possible in any month near Florissant, based on NOAA 1991-2020 records for the Florissant Fossil Bed, 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) | — | — | 37 days | 100% |
| Frost / freeze (32°F) | — | — | 68 days | 100% |
| Hard freeze (28°F) | May 24 · Jun 5 · Jun 25 | Sep 2 · Sep 14 · Sep 27 | 99 days | 100% |
Where these dates come from
ZIP code 80816 is matched to the NOAA station Florissant Fossil Bed, CO, 6.9 km away, at 8,402 ft elevation (417 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Florissant Fossil Bed, CO (used) | 8,402 ft | — | — |
| Cripple Creek 3Nnw, CO | 9,235 ft | May 26 | Sep 26 |
| Divide 4Nw, CO | 9,134 ft | Jun 1 | Sep 21 |
| Lake George 8 Sw, CO | 8,550 ft | Jun 2 | Sep 19 |
Frost dates near Florissant
- Cripple Creek, CO 80813 · last May 26, first Sep 26
- Divide, CO 80814 · last Jun 1, first Sep 21
- Victor, CO 80860 · last May 26, first Sep 26
- Lake George, CO 80827 · last Jun 2, first Sep 19
- Guffey, CO 80820 · last Jun 2, first Sep 19
- Woodland Park, CO 80863 · last —, first —
- Green Mountain Falls, CO 80819 · last —, first —
- Cascade, CO 80809 · last May 14, first Oct 1
Frequently asked questions
- When is the last frost in Florissant, CO?
- Frost is possible in any month at the nearest NOAA station (Florissant Fossil Bed, CO), so there is no reliable average last frost date.
- When is the first frost in Florissant, 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.