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🌷 Last Frost Dates for Dorsey, Illinois 62021

The last 36°F Spring frost date is 30% likely to be on Apr 16. (See detailed probabilities below.)

The last 32°F light freeze date is 30% likely to be on Apr 7. (See detailed probabilities below.)

(See also 🍂 First Fall Frost Dates.)

Last frost date probabilities for Dorsey, IL 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% chanceApr 25
20% chanceApr 20
30% chanceApr 16
40% chanceApr 13
50% chanceApr 10
60% chanceApr 7
70% chanceApr 4
80% chanceApr 1
90% chanceMar 28
Probability of light freeze (32°F) on or after…
10% chanceApr 16
20% chanceApr 10
30% chanceApr 7
40% chanceApr 4
50% chanceApr 2
60% chanceMar 30
70% chanceMar 26
80% chanceMar 22
90% chanceMar 16
Probability of moderate freeze (28°F) on or after…
10% chanceApr 7
20% chanceApr 3
30% chanceMar 31
40% chanceMar 26
50% chanceMar 23
60% chanceMar 19
70% chanceMar 15
80% chanceMar 11
90% chanceMar 6
Probability of moderate hard freeze (24°F) on or after…
10% chanceMar 31
20% chanceMar 24
30% chanceMar 19
40% chanceMar 15
50% chanceMar 12
60% chanceMar 8
70% chanceMar 4
80% chanceMar 1
90% chanceFeb 23
Probability of hard freeze (20°F) on or after…
10% chanceMar 19
20% chanceMar 13
30% chanceMar 8
40% chanceMar 5
50% chanceMar 2
60% chanceFeb 27
70% chanceFeb 22
80% chanceFeb 17
90% chanceFeb 9
Probability of severe hard freeze (16°F) on or after…
10% chanceMar 11
20% chanceMar 5
30% chanceMar 1
40% chanceFeb 25
50% chanceFeb 20
60% chanceFeb 16
70% chanceFeb 11
80% chanceFeb 6
90% chanceJan 31

Agricultural climatic data from weather station: ALTON MELVIN PRICE L&D (USC00110137)

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