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🍂 First Frost Dates for Brookport, Illinois 62910

The first 36°F frost date is 30% likely to be on Oct 15. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 24. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Brookport, 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 First Frost Date?

The first fall frost signals the end of your local growing season. This date serves as an important deadline for gardeners and farmers. You'll need to complete harvesting before this point. Annuals and other tender plants will die back when frost hits, and perennial plants will enter their dormant phase for winter. Meanwhile, it's time to enjoy a cup of hot cocoa and a cozy sweater—and start planning your spring garden!

How to use the First Frost Date?

Watch your local weather forecasts in early fall to predict the first frost date. Harvest tender crops and protect vulnerable plants before frost arrives. For late-summer plantings, count backward from your area's average first frost date. This ensures your crops have enough time to mature. Keep track of when frost actually occurs in your garden each year. This helps you identify protected spots where the growing season might last longer.

First Frost Date Probabilities

Probability of frost (36°F) on or before...
10% chanceOct 6
20% chanceOct 11
30% chanceOct 15
40% chanceOct 18
50% chanceOct 21
60% chanceOct 23
70% chanceOct 26
80% chanceOct 29
90% chanceNov 2
Probability of light freeze (32°F) on or before...
10% chanceOct 15
20% chanceOct 21
30% chanceOct 24
40% chanceOct 27
50% chanceOct 30
60% chanceNov 1
70% chanceNov 4
80% chanceNov 8
90% chanceNov 13
Probability of moderate freeze (28°F) on or before...
10% chanceOct 24
20% chanceOct 30
30% chanceNov 2
40% chanceNov 5
50% chanceNov 8
60% chanceNov 12
70% chanceNov 16
80% chanceNov 21
90% chanceNov 28
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 1
20% chanceNov 7
30% chanceNov 13
40% chanceNov 17
50% chanceNov 21
60% chanceNov 26
70% chanceNov 30
80% chanceDec 3
90% chanceDec 10
Probability of hard freeze (20°F) on or before...
10% chanceNov 12
20% chanceNov 20
30% chanceNov 26
40% chanceDec 1
50% chanceDec 3
60% chanceDec 7
70% chanceDec 11
80% chanceDec 16
90% chanceDec 23
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 26
20% chanceDec 1
30% chanceDec 6
40% chanceDec 10
50% chanceDec 15
60% chanceDec 19
70% chanceDec 24
80% chanceDec 29
90% chanceJan 4

Agricultural climatic data from weather station: SMITHLAND L&D (USC00118020)

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