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🍂 First Frost Dates for Cedar Falls, Iowa 50613

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 28. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Cedar Falls, 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 13
20% chanceSep 18
30% chanceSep 20
40% chanceSep 23
50% chanceSep 25
60% chanceSep 27
70% chanceSep 29
80% chanceOct 2
90% chanceOct 6
Probability of light freeze (32°F) on or before...
10% chanceSep 21
20% chanceSep 25
30% chanceSep 28
40% chanceOct 1
50% chanceOct 3
60% chanceOct 5
70% chanceOct 8
80% chanceOct 11
90% chanceOct 16
Probability of moderate freeze (28°F) on or before...
10% chanceSep 30
20% chanceOct 4
30% chanceOct 8
40% chanceOct 11
50% chanceOct 13
60% chanceOct 16
70% chanceOct 19
80% chanceOct 23
90% chanceOct 27
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 9
20% chanceOct 15
30% chanceOct 18
40% chanceOct 21
50% chanceOct 24
60% chanceOct 27
70% chanceOct 30
80% chanceNov 2
90% chanceNov 7
Probability of hard freeze (20°F) on or before...
10% chanceOct 19
20% chanceOct 24
30% chanceOct 28
40% chanceNov 1
50% chanceNov 3
60% chanceNov 6
70% chanceNov 9
80% chanceNov 13
90% chanceNov 19
Probability of severe hard freeze (16°F) on or before...
10% chanceOct 31
20% chanceNov 3
30% chanceNov 7
40% chanceNov 10
50% chanceNov 13
60% chanceNov 17
70% chanceNov 20
80% chanceNov 24
90% chanceNov 29

Agricultural climatic data from weather station: WATERLOO MUNI AP (USW00094910)

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