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🍂 First Frost Dates for Boyden, Iowa 51234

The first 36°F frost date is 30% likely to be on Sep 13. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Sep 19. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Boyden, 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 6
20% chanceSep 10
30% chanceSep 13
40% chanceSep 15
50% chanceSep 17
60% chanceSep 20
70% chanceSep 22
80% chanceSep 25
90% chanceSep 29
Probability of light freeze (32°F) on or before...
10% chanceSep 13
20% chanceSep 17
30% chanceSep 19
40% chanceSep 22
50% chanceSep 24
60% chanceSep 26
70% chanceSep 29
80% chanceOct 2
90% chanceOct 6
Probability of moderate freeze (28°F) on or before...
10% chanceSep 19
20% chanceSep 24
30% chanceSep 27
40% chanceSep 29
50% chanceOct 1
60% chanceOct 4
70% chanceOct 6
80% chanceOct 10
90% chanceOct 15
Probability of moderate hard freeze (24°F) on or before...
10% chanceSep 27
20% chanceOct 1
30% chanceOct 5
40% chanceOct 8
50% chanceOct 11
60% chanceOct 14
70% chanceOct 17
80% chanceOct 20
90% chanceOct 25
Probability of hard freeze (20°F) on or before...
10% chanceOct 5
20% chanceOct 11
30% chanceOct 15
40% chanceOct 18
50% chanceOct 21
60% chanceOct 24
70% chanceOct 27
80% chanceOct 31
90% chanceNov 4
Probability of severe hard freeze (16°F) on or before...
10% chanceOct 16
20% chanceOct 21
30% chanceOct 25
40% chanceOct 29
50% chanceNov 1
60% chanceNov 3
70% chanceNov 6
80% chanceNov 10
90% chanceNov 15

Agricultural climatic data from weather station: SHELDON (USC00137594)

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