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🍂 First Frost Dates for Pilot Mound, Iowa 50223

The first 36°F frost date is 30% likely to be on Sep 22. (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 Pilot Mound, 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 22
40% chanceSep 25
50% chanceSep 27
60% chanceSep 30
70% chanceOct 2
80% chanceOct 5
90% chanceOct 10
Probability of light freeze (32°F) on or before...
10% chanceSep 23
20% chanceSep 27
30% chanceSep 30
40% chanceOct 3
50% chanceOct 6
60% chanceOct 9
70% chanceOct 12
80% chanceOct 15
90% chanceOct 21
Probability of moderate freeze (28°F) on or before...
10% chanceOct 1
20% chanceOct 6
30% chanceOct 10
40% chanceOct 14
50% chanceOct 17
60% chanceOct 20
70% chanceOct 24
80% chanceOct 28
90% chanceNov 1
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 12
20% chanceOct 18
30% chanceOct 23
40% chanceOct 27
50% chanceOct 30
60% chanceNov 1
70% chanceNov 4
80% chanceNov 8
90% chanceNov 13
Probability of hard freeze (20°F) on or before...
10% chanceOct 25
20% chanceOct 31
30% chanceNov 2
40% chanceNov 5
50% chanceNov 8
60% chanceNov 12
70% chanceNov 15
80% chanceNov 19
90% chanceNov 25
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 3
20% chanceNov 8
30% chanceNov 11
40% chanceNov 15
50% chanceNov 18
60% chanceNov 22
70% chanceNov 26
80% chanceNov 30
90% chanceDec 4

Agricultural climatic data from weather station: BOONE (USC00130807)

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