Clinton, MT frost dates
Last spring frostAny monthno frost-free season
Freezing nights247 / yrat or below 32°F
Hardiness zone5bZone 5b
Gardening where frost is possible all year
The weather station nearest Clinton, MT 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 Clinton compares
- Nearby Missoula, MT, 28 km away, has a regular frost season (last frost May 10), a reminder of how much elevation and distance from the coast matter.
About these dates
Based on 1991–2020 NOAA climate normals for the Potomac, MT weather station, 16 km away (elevation 3,691 ft (1,125 m)).
Frost dates near Clinton
- Bonner May 10 · Oct 1
- Milltown May 10 · Oct 1
- Missoula May 10 · Oct 1
- Lolo May 16 · Sep 26
- Florence May 22 · Sep 19
- Drummond frost any month
- Stevensville May 22 · Sep 19
- Hall frost any month
- Seeley Lake frost any month
- Frenchtown May 18 · Sep 25
Frequently asked questions
When is the last frost in Clinton, MT?
Clinton, MT can freeze in any month, so there is no reliable last frost date. The nearest NOAA station averages 247 nights a year at or below 32°F.
What can I grow in Clinton, MT?
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.