Frontier, WY frost dates
Last spring frostAny monthno frost-free season
Freezing nights246 / yrat or below 32°F
Hardiness zone4bZone 4b
Gardening where frost is possible all year
The weather station nearest Frontier, WY 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 Frontier compares
- Nearby Logan, UT, 109 km away, has a regular frost season (last frost May 8), a reminder of how much elevation and distance from the coast matter.
About these dates
Based on 1991–2020 NOAA climate normals for the Kemmerer 2n, WY weather station, about 1 km away (elevation 6,936 ft (2,114 m)).
Frost dates near Frontier
- Kemmerer frost any month
- Diamondville frost any month
- Opal frost any month
- Cokeville frost any month
- Granger May 25 · Sep 27
- La Barge Jun 9 · Sep 4
- Fort Bridger Jun 14 · Sep 9
- Lyman Jun 14 · Sep 9
- Little America May 25 · Sep 27
- Mountain View Jun 14 · Sep 9
Frequently asked questions
When is the last frost in Frontier, WY?
Frontier, WY can freeze in any month, so there is no reliable last frost date. The nearest NOAA station averages 246 nights a year at or below 32°F.
What can I grow in Frontier, WY?
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.