The last 36°F Spring frost date is 30% likely to be on Jun 17. (See detailed probabilities below.)
The last 32°F light freeze date is 30% likely to be on May 27. (See detailed probabilities below.)
(See also 🍂 First Fall Frost Dates.)
Last frost date probabilities for Alberton, MT are based on historical climate data.
Always check your local forecast for the most up-to-date frost warnings.
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📚 Growing Under Cover: Techniques for a More Productive, Weather-Resistant, Pest-Free Vegetable Garden
The last spring frost signals when your area is safe from freezing temperatures. Tender plants can now grow outdoors without cold damage! This marks the beginning of the growing season. Last spring frost serves as your essential starting point for planting warm-season crops. It's also time to remove winter protection from your perennials. Enjoy the longer days and warmer weather!
Start seeds indoors several weeks before your last frost date. This gives plants time to reach transplanting size when weather permits. Plan your outdoor planting schedule around your area's average last frost date. Plant some crops before and some after this date to protect against weather changes. Look for spots in your yard where frost stays longer or disappears earlier. Create your own frost map to use all available growing space and extend your season. Keep watching your local weather forecast to catch any surprise late frosts.
| Probability of frost (36°F) on or after… | |
|---|---|
| 10% chance | Jul 2 |
| 20% chance | Jun 24 |
| 30% chance | Jun 17 |
| 40% chance | Jun 10 |
| 50% chance | Jun 5 |
| 60% chance | Jun 1 |
| 70% chance | May 29 |
| 80% chance | May 26 |
| 90% chance | May 20 |
| Probability of light freeze (32°F) on or after… | |
|---|---|
| 10% chance | Jun 19 |
| 20% chance | Jun 1 |
| 30% chance | May 27 |
| 40% chance | May 22 |
| 50% chance | May 19 |
| 60% chance | May 16 |
| 70% chance | May 13 |
| 80% chance | May 9 |
| 90% chance | May 4 |
| Probability of moderate freeze (28°F) on or after… | |
|---|---|
| 10% chance | May 22 |
| 20% chance | May 14 |
| 30% chance | May 9 |
| 40% chance | May 6 |
| 50% chance | May 3 |
| 60% chance | May 1 |
| 70% chance | Apr 28 |
| 80% chance | Apr 24 |
| 90% chance | Apr 19 |
| Probability of moderate hard freeze (24°F) on or after… | |
|---|---|
| 10% chance | May 6 |
| 20% chance | Apr 30 |
| 30% chance | Apr 24 |
| 40% chance | Apr 19 |
| 50% chance | Apr 15 |
| 60% chance | Apr 10 |
| 70% chance | Apr 4 |
| 80% chance | Mar 31 |
| 90% chance | Mar 23 |
| Probability of hard freeze (20°F) on or after… | |
|---|---|
| 10% chance | Apr 18 |
| 20% chance | Apr 7 |
| 30% chance | Apr 1 |
| 40% chance | Mar 28 |
| 50% chance | Mar 21 |
| 60% chance | Mar 16 |
| 70% chance | Mar 11 |
| 80% chance | Mar 6 |
| 90% chance | Feb 28 |
| Probability of severe hard freeze (16°F) on or after… | |
|---|---|
| 10% chance | Mar 26 |
| 20% chance | Mar 18 |
| 30% chance | Mar 12 |
| 40% chance | Mar 7 |
| 50% chance | Mar 4 |
| 60% chance | Feb 28 |
| 70% chance | Feb 24 |
| 80% chance | Feb 18 |
| 90% chance | Feb 10 |
Agricultural climatic data from weather station: SUPERIOR (USW00024159)