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🍂 First Frost Dates for Carlisle, Massachusetts 01741

The first 36°F frost date is 30% likely to be on Sep 26. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 4. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

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

Agricultural climatic data from weather station: BEDFORD (USC00190535)

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