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🍂 First Frost Dates for Jaffrey, New Hampshire 03452

The first 36°F frost date is 30% likely to be on Sep 14. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Sep 27. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

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

Agricultural climatic data from weather station: JAFFREY MUNI AP (USW00054770)

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