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🍂 First Frost Dates for Alcoa, Tennessee 37701

The first 36°F frost date is 30% likely to be on Oct 18. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 28. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Alcoa, TN 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 10
20% chanceOct 15
30% chanceOct 18
40% chanceOct 21
50% chanceOct 23
60% chanceOct 26
70% chanceOct 28
80% chanceNov 1
90% chanceNov 6
Probability of light freeze (32°F) on or before...
10% chanceOct 20
20% chanceOct 25
30% chanceOct 28
40% chanceOct 31
50% chanceNov 2
60% chanceNov 5
70% chanceNov 8
80% chanceNov 12
90% chanceNov 18
Probability of moderate freeze (28°F) on or before...
10% chanceOct 31
20% chanceNov 5
30% chanceNov 8
40% chanceNov 12
50% chanceNov 15
60% chanceNov 18
70% chanceNov 21
80% chanceNov 27
90% chanceDec 3
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 11
20% chanceNov 17
30% chanceNov 21
40% chanceNov 26
50% chanceNov 30
60% chanceDec 2
70% chanceDec 6
80% chanceDec 11
90% chanceDec 19
Probability of hard freeze (20°F) on or before...
10% chanceNov 24
20% chanceDec 1
30% chanceDec 5
40% chanceDec 9
50% chanceDec 13
60% chanceDec 18
70% chanceDec 23
80% chanceDec 29
90% chanceJan 5
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 6
20% chanceDec 12
30% chanceDec 17
40% chanceDec 23
50% chanceDec 27
60% chanceDec 31
70% chanceJan 5
80% chanceJan 12
90% chanceJan 23

Agricultural climatic data from weather station: KNOXVILLE MCGHEE TYSON AP (USW00013891)

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