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🍂 First Frost Dates for Princeton Junction, New Jersey 08550

The first 36°F frost date is 30% likely to be on Oct 2. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 12. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

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

Agricultural climatic data from weather station: HIGHTSTOWN 2 W (USC00283951)

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