Olney, MT frost dates

Gardening where frost is possible all year

The weather station nearest Olney, 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.

About these dates

Based on 1991–2020 NOAA climate normals for the Olney, MT weather station, about 1 km away (elevation 3,166 ft (965 m)).

Frost dates near Olney

• Stryker May 16 · Sep 18
• Whitefish May 16 · Sep 25
• Trego May 16 · Sep 18
• Fortine May 16 · Sep 18
• Polebridge frost any month
• Columbia Falls May 31 · Sep 10
• Kalispell May 31 · Sep 10
• Coram May 18 · Sep 20
• Hungry Horse May 9 · Oct 1
• Martin City May 9 · Oct 1

Frequently asked questions

When is the last frost in Olney, MT?

Olney, MT can freeze in any month, so there is no reliable last frost date. The nearest NOAA station averages 234 nights a year at or below 32°F.

What can I grow in Olney, 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.