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🍂 First Frost Dates for Moorhead, Iowa 51558

The first 36°F frost date is 30% likely to be on Sep 23. (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 Moorhead, IA 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 16
20% chanceSep 20
30% chanceSep 23
40% chanceSep 26
50% chanceSep 28
60% chanceOct 1
70% chanceOct 3
80% chanceOct 6
90% chanceOct 11
Probability of light freeze (32°F) on or before...
10% chanceSep 22
20% chanceSep 27
30% chanceSep 30
40% chanceOct 3
50% chanceOct 6
60% chanceOct 9
70% chanceOct 12
80% chanceOct 16
90% chanceOct 21
Probability of moderate freeze (28°F) on or before...
10% chanceSep 30
20% chanceOct 6
30% chanceOct 10
40% chanceOct 13
50% chanceOct 16
60% chanceOct 20
70% chanceOct 23
80% chanceOct 27
90% chanceNov 1
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 10
20% chanceOct 16
30% chanceOct 21
40% chanceOct 24
50% chanceOct 27
60% chanceOct 31
70% chanceNov 2
80% chanceNov 6
90% chanceNov 11
Probability of hard freeze (20°F) on or before...
10% chanceOct 20
20% chanceOct 26
30% chanceOct 31
40% chanceNov 2
50% chanceNov 5
60% chanceNov 8
70% chanceNov 11
80% chanceNov 15
90% chanceNov 21
Probability of severe hard freeze (16°F) on or before...
10% chanceOct 30
20% chanceNov 3
30% chanceNov 7
40% chanceNov 10
50% chanceNov 13
60% chanceNov 17
70% chanceNov 21
80% chanceNov 25
90% chanceDec 1

Agricultural climatic data from weather station: CASTANA EXP FARM (USC00131277)

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