Alpine, WY frost dates
Last spring frostAny monthno frost-free season
Freezing nights238 / yrat or below 32°F
Hardiness zone5bZone 5b
Gardening where frost is possible all year
The weather station nearest Alpine, 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 Alpine compares
- Nearby Idaho Falls, ID, 87 km away, has a regular frost season (last frost May 9), a reminder of how much elevation and distance from the coast matter.
About these dates
Based on 1991–2020 NOAA climate normals for the Bedford 3 Se, WY weather station, 33 km away (elevation 6,355 ft (1,937 m)).
Frost dates near Alpine
- Etna frost any month
- Freedom frost any month
- Thayne frost any month
- Bedford frost any month
- Wilson frost any month
- Auburn Jun 20 · Sep 1
- Jackson frost any month
- Grover Jun 20 · Sep 1
- Teton Village Jun 20 · Aug 31
- Afton Jun 20 · Sep 1
Frequently asked questions
When is the last frost in Alpine, WY?
Alpine, WY can freeze in any month, so there is no reliable last frost date. The nearest NOAA station averages 238 nights a year at or below 32°F.
What can I grow in Alpine, 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.