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🍂 First Frost Dates for Smyrna Mills, Maine 04780

The first 36°F frost date is 30% likely to be on Sep 7. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Sep 23. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Smyrna Mills, ME 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% chanceAug 31
20% chanceSep 4
30% chanceSep 7
40% chanceSep 11
50% chanceSep 14
60% chanceSep 17
70% chanceSep 20
80% chanceSep 24
90% chanceSep 28
Probability of light freeze (32°F) on or before...
10% chanceSep 14
20% chanceSep 19
30% chanceSep 23
40% chanceSep 25
50% chanceSep 28
60% chanceSep 30
70% chanceOct 2
80% chanceOct 5
90% chanceOct 9
Probability of moderate freeze (28°F) on or before...
10% chanceSep 26
20% chanceOct 1
30% chanceOct 3
40% chanceOct 5
50% chanceOct 8
60% chanceOct 10
70% chanceOct 13
80% chanceOct 17
90% chanceOct 22
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 6
20% chanceOct 11
30% chanceOct 15
40% chanceOct 18
50% chanceOct 21
60% chanceOct 24
70% chanceOct 27
80% chanceOct 31
90% chanceNov 4
Probability of hard freeze (20°F) on or before...
10% chanceOct 20
20% chanceOct 25
30% chanceOct 29
40% chanceNov 1
50% chanceNov 3
60% chanceNov 5
70% chanceNov 8
80% chanceNov 12
90% chanceNov 17
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 2
20% chanceNov 6
30% chanceNov 10
40% chanceNov 12
50% chanceNov 15
60% chanceNov 18
70% chanceNov 20
80% chanceNov 23
90% chanceNov 26

Agricultural climatic data from weather station: PATTEN 2 (USC00176594)

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