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🍂 First Frost Dates for Altha, Florida 32421

The first 36°F frost date is 30% likely to be on Nov 6. (See detailed probabilities below.)

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

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Altha, FL 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 28
20% chanceNov 2
30% chanceNov 6
40% chanceNov 10
50% chanceNov 13
60% chanceNov 17
70% chanceNov 21
80% chanceNov 27
90% chanceDec 4
Probability of light freeze (32°F) on or before...
10% chanceNov 9
20% chanceNov 16
30% chanceNov 21
40% chanceNov 25
50% chanceNov 29
60% chanceDec 2
70% chanceDec 6
80% chanceDec 11
90% chanceDec 21
Probability of moderate freeze (28°F) on or before...
10% chanceNov 25
20% chanceDec 1
30% chanceDec 4
40% chanceDec 8
50% chanceDec 13
60% chanceDec 18
70% chanceDec 24
80% chanceJan 1
90% chanceJan 9
Probability of moderate hard freeze (24°F) on or before...
10% chanceDec 5
20% chanceDec 11
30% chanceDec 16
40% chanceDec 21
50% chanceDec 26
60% chanceJan 1
70% chanceJan 5
80% chanceJan 14
90% chanceJan 28
Probability of hard freeze (20°F) on or before...
10% chanceDec 10
20% chanceDec 17
30% chanceDec 22
40% chanceDec 28
50% chanceJan 1
60% chanceJan 5
70% chanceJan 11
80% chanceJan 20
90% chanceJan 31
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 13
20% chanceDec 20
30% chanceDec 27
40% chanceDec 31
50% chanceJan 2
60% chanceJan 6
70% chanceJan 13
80% chanceJan 21
90% chanceJan 29

Agricultural climatic data from weather station: MARIANNA MUNI AP (USW00003818)

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