🌷 Last Frost Dates for Idaho Falls, Idaho 83404

The last 36°F Spring frost date is 30% likely to be on Jun 12. (See detailed probabilities below.)

The last 32°F light freeze date is 30% likely to be on May 25. (See detailed probabilities below.)

(See also 🍂 First Fall Frost Dates.)

Last frost date probabilities for Idaho Falls, ID are based on historical climate data.

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

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 25
20% chanceJun 17
30% chanceJun 12
40% chanceJun 8
50% chanceJun 5
60% chanceJun 1
70% chanceMay 29
80% chanceMay 24
90% chanceMay 18
Probability of light freeze (32°F) on or after…
10% chanceJun 6
20% chanceMay 31
30% chanceMay 25
40% chanceMay 21
50% chanceMay 17
60% chanceMay 14
70% chanceMay 11
80% chanceMay 7
90% chanceMay 3
Probability of moderate freeze (28°F) on or after…
10% chanceMay 19
20% chanceMay 13
30% chanceMay 9
40% chanceMay 6
50% chanceMay 3
60% chanceMay 1
70% chanceApr 28
80% chanceApr 24
90% chanceApr 18
Probability of moderate hard freeze (24°F) on or after…
10% chanceMay 6
20% chanceMay 1
30% chanceApr 27
40% chanceApr 23
50% chanceApr 19
60% chanceApr 15
70% chanceApr 11
80% chanceApr 6
90% chanceMar 31
Probability of hard freeze (20°F) on or after…
10% chanceApr 23
20% chanceApr 15
30% chanceApr 9
40% chanceApr 5
50% chanceApr 1
60% chanceMar 28
70% chanceMar 22
80% chanceMar 16
90% chanceMar 9
Probability of severe hard freeze (16°F) on or after…
10% chanceApr 4
20% chanceMar 29
30% chanceMar 22
40% chanceMar 17
50% chanceMar 12
60% chanceMar 9
70% chanceMar 6
80% chanceMar 2
90% chanceFeb 26

Agricultural climatic data from weather station: IDAHO FALLS - KIFI (USC00104455)