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🍂 First Frost Dates for Morris Plains, New Jersey 07950

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 11. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

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

Agricultural climatic data from weather station: BOONTON 1 SE (USC00280907)

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