Frisco, CO frost dates
Last spring frostAny monthno frost-free season
Freezing nights274 / yrat or below 32°F
Hardiness zone5aZone 5a
Gardening where frost is possible all year
The weather station nearest Frisco, 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 Frisco compares
- Nearby Boulder, CO, 89 km away, has a regular frost season (last frost May 6), a reminder of how much elevation and distance from the coast matter.
About these dates
Based on 1991–2020 NOAA climate normals for the Dillon 1 E, CO weather station, 11 km away (elevation 9,065 ft (2,763 m)).
Frost dates near Frisco
- Breckenridge frost any month
- Dillon frost any month
- Silverthorne frost any month
- Red Cliff Jun 21 · Sep 7
- Minturn Jun 21 · Sep 7
- Vail Jun 21 · Sep 7
- Alma Jun 16 · Sep 9
- Avon Jun 21 · Sep 7
- Silver Plume May 30 · Sep 19
- Leadville frost any month
Frequently asked questions
When is the last frost in Frisco, CO?
Frisco, CO can freeze in any month, so there is no reliable last frost date. The nearest NOAA station averages 274 nights a year at or below 32°F.
What can I grow in Frisco, 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.