🌷 Your Ultimate Garden Calendar!

🌷 Last Frost Dates for Ingomar, Montana 59039

The last 36°F Spring frost date is 30% likely to be on Jun 3. (See detailed probabilities below.)

The last 32°F light freeze date is 30% likely to be on May 21. (See detailed probabilities below.)

(See also 🍂 First Fall Frost Dates.)

Last frost date probabilities for Ingomar, 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 13
20% chanceJun 7
30% chanceJun 3
40% chanceMay 31
50% chanceMay 28
60% chanceMay 24
70% chanceMay 21
80% chanceMay 17
90% chanceMay 12
Probability of light freeze (32°F) on or after…
10% chanceMay 31
20% chanceMay 25
30% chanceMay 21
40% chanceMay 18
50% chanceMay 15
60% chanceMay 12
70% chanceMay 9
80% chanceMay 5
90% chanceMay 2
Probability of moderate freeze (28°F) on or after…
10% chanceMay 19
20% chanceMay 13
30% chanceMay 10
40% chanceMay 6
50% chanceMay 3
60% chanceMay 1
70% chanceApr 29
80% chanceApr 25
90% chanceApr 20
Probability of moderate hard freeze (24°F) on or after…
10% chanceMay 7
20% chanceMay 2
30% chanceApr 30
40% chanceApr 26
50% chanceApr 23
60% chanceApr 20
70% chanceApr 17
80% chanceApr 12
90% chanceApr 7
Probability of hard freeze (20°F) on or after…
10% chanceApr 29
20% chanceApr 22
30% chanceApr 19
40% chanceApr 15
50% chanceApr 11
60% chanceApr 7
70% chanceApr 4
80% chanceMar 31
90% chanceMar 24
Probability of severe hard freeze (16°F) on or after…
10% chanceApr 19
20% chanceApr 12
30% chanceApr 8
40% chanceApr 4
50% chanceMar 31
60% chanceMar 28
70% chanceMar 23
80% chanceMar 18
90% chanceMar 10

Agricultural climatic data from weather station: INGOMAR 14 NE (USC00244386)

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