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🍂 First Frost Dates for Lebanon, Maine 04027

The first 36°F frost date is 30% likely to be on Sep 19. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 1. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

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

Agricultural climatic data from weather station: ROCHESTER SKYHAVEN AP (USW00054791)

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