Florissant, CO frost dates
Last spring frostAny monthno frost-free season
Freezing nights250 / yrat or below 32°F
Hardiness zone5aZone 5a
Gardening where frost is possible all year
The weather station nearest Florissant, CO records freezing temperatures in every month often enough that NOAA cannot define a frost-free season. Gardening is still possible — it just means planning for frost at any time:
- Grow fast, cold-tolerant crops: Radishes, Lettuce, Spinach, Kale, Peas, Potatoes, Swiss Chard, Garlic.
- Plant once the soil can be worked — usually late spring to early summer at high elevation — and keep row covers ready for clear, still nights.
- Use season extension: cold frames, low tunnels, wall-of-water cloches or a greenhouse turn a few frost-free weeks into a real season.
- Frost-tender crops (tomatoes, squash, beans) need protection all season; choose the earliest varieties you can find.
How Florissant compares
- Nearby Colorado Springs, CO, 47 km away, has a regular frost season (last frost May 3), a reminder of how much elevation and distance from the coast matter.
About these dates
Based on 1991–2020 NOAA climate normals for the Florissant Fossil Bed, CO weather station, 7 km away (elevation 8,402 ft (2,561 m)).
Frost dates near Florissant
- Cripple Creek May 26 · Sep 26
- Divide Jun 1 · Sep 21
- Victor May 26 · Sep 26
- Lake George Jun 2 · Sep 19
- Guffey Jun 2 · Sep 19
- Woodland Park Jun 1 · Sep 21
- Green Mountain Falls Jun 3 · Sep 17
- Cascade Jun 3 · Sep 17
- Manitou Springs Jun 3 · Sep 17
- Canon City May 4 · Oct 7
Frequently asked questions
When is the last frost in Florissant, CO?
Florissant, CO can freeze in any month, so there is no reliable last frost date. The nearest NOAA station averages 250 nights a year at or below 32°F.
What can I grow in Florissant, CO?
Fast, cold-tolerant crops such as radishes, lettuce, spinach, kale, peas and potatoes, ideally under row covers, cold frames or a greenhouse. Frost-tender crops like tomatoes need protection all season.