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🍂 First Frost Dates for Forestville, Wisconsin 54213

The first 36°F frost date is 30% likely to be on Sep 28. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 6. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Forestville, WI 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% chanceSep 20
20% chanceSep 24
30% chanceSep 28
40% chanceSep 30
50% chanceOct 2
60% chanceOct 4
70% chanceOct 6
80% chanceOct 9
90% chanceOct 14
Probability of light freeze (32°F) on or before...
10% chanceSep 30
20% chanceOct 3
30% chanceOct 6
40% chanceOct 8
50% chanceOct 11
60% chanceOct 14
70% chanceOct 17
80% chanceOct 21
90% chanceOct 27
Probability of moderate freeze (28°F) on or before...
10% chanceOct 8
20% chanceOct 13
30% chanceOct 17
40% chanceOct 21
50% chanceOct 24
60% chanceOct 28
70% chanceOct 31
80% chanceNov 3
90% chanceNov 9
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 20
20% chanceOct 26
30% chanceOct 31
40% chanceNov 2
50% chanceNov 6
60% chanceNov 9
70% chanceNov 12
80% chanceNov 15
90% chanceNov 21
Probability of hard freeze (20°F) on or before...
10% chanceNov 2
20% chanceNov 6
30% chanceNov 10
40% chanceNov 14
50% chanceNov 17
60% chanceNov 19
70% chanceNov 22
80% chanceNov 26
90% chanceDec 1
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 11
20% chanceNov 16
30% chanceNov 19
40% chanceNov 23
50% chanceNov 25
60% chanceNov 28
70% chanceDec 1
80% chanceDec 5
90% chanceDec 11

Agricultural climatic data from weather station: KEWAUNEE (USC00474195)

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