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🍂 First Frost Dates for Hart, Michigan 49420

The first 36°F frost date is 30% likely to be on Sep 20. (See detailed probabilities below.)

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

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Hart, MI 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 11
20% chanceSep 16
30% chanceSep 20
40% chanceSep 22
50% chanceSep 25
60% chanceSep 28
70% chanceSep 30
80% chanceOct 3
90% chanceOct 7
Probability of light freeze (32°F) on or before...
10% chanceSep 22
20% chanceSep 27
30% chanceSep 30
40% chanceOct 2
50% chanceOct 5
60% chanceOct 8
70% chanceOct 11
80% chanceOct 15
90% chanceOct 21
Probability of moderate freeze (28°F) on or before...
10% chanceOct 2
20% chanceOct 7
30% chanceOct 12
40% chanceOct 15
50% chanceOct 19
60% chanceOct 23
70% chanceOct 28
80% chanceNov 1
90% chanceNov 5
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 16
20% chanceOct 23
30% chanceOct 29
40% chanceNov 1
50% chanceNov 4
60% chanceNov 8
70% chanceNov 11
80% chanceNov 15
90% chanceNov 21
Probability of hard freeze (20°F) on or before...
10% chanceNov 3
20% chanceNov 8
30% chanceNov 13
40% chanceNov 17
50% chanceNov 21
60% chanceNov 24
70% chanceNov 28
80% chanceDec 1
90% chanceDec 7
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 14
20% chanceNov 21
30% chanceNov 26
40% chanceNov 30
50% chanceDec 2
60% chanceDec 6
70% chanceDec 10
80% chanceDec 15
90% chanceDec 21

Agricultural climatic data from weather station: HART 3 WSW (USC00203632)

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