🌷 Your Ultimate Garden Calendar!

🌷 Last Frost Dates for Malta, Montana 59538

The last 36°F Spring frost date is 30% likely to be on Jun 2. (See detailed probabilities below.)

The last 32°F light freeze date is 30% likely to be on May 22. (See detailed probabilities below.)

(See also 🍂 First Fall Frost Dates.)

Last frost date probabilities for Malta, MT are based on historical climate data.

Always check your local forecast for the most up-to-date frost warnings.

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What is a Last Frost Date?

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!

How to use the Last Frost Date?

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.

Last Frost Date Probabilities

Probability of frost (36°F) on or after…
10% chanceJun 11
20% chanceJun 5
30% chanceJun 2
40% chanceMay 31
50% chanceMay 28
60% chanceMay 25
70% chanceMay 22
80% chanceMay 19
90% chanceMay 15
Probability of light freeze (32°F) on or after…
10% chanceMay 31
20% chanceMay 26
30% chanceMay 22
40% chanceMay 19
50% chanceMay 17
60% chanceMay 14
70% chanceMay 11
80% chanceMay 7
90% chanceMay 2
Probability of moderate freeze (28°F) on or after…
10% chanceMay 19
20% chanceMay 14
30% chanceMay 10
40% chanceMay 7
50% chanceMay 4
60% chanceMay 1
70% chanceApr 29
80% chanceApr 25
90% chanceApr 20
Probability of moderate hard freeze (24°F) on or after…
10% chanceMay 8
20% chanceMay 4
30% chanceApr 30
40% chanceApr 27
50% chanceApr 24
60% chanceApr 21
70% chanceApr 17
80% chanceApr 12
90% chanceApr 6
Probability of hard freeze (20°F) on or after…
10% chanceMay 1
20% chanceApr 25
30% chanceApr 20
40% chanceApr 16
50% chanceApr 12
60% chanceApr 9
70% chanceApr 5
80% chanceApr 2
90% chanceMar 29
Probability of severe hard freeze (16°F) on or after…
10% chanceApr 21
20% chanceApr 15
30% chanceApr 10
40% chanceApr 7
50% chanceApr 4
60% chanceApr 1
70% chanceMar 29
80% chanceMar 23
90% chanceMar 16

Agricultural climatic data from weather station: MALTA 35 S (USC00245340)

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