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🍂 First Frost Dates for Ames, Nebraska 68621

The first 36°F frost date is 30% likely to be on Sep 24. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 1. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Ames, NE 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 17
20% chanceSep 21
30% chanceSep 24
40% chanceSep 27
50% chanceSep 29
60% chanceOct 1
70% chanceOct 4
80% chanceOct 7
90% chanceOct 11
Probability of light freeze (32°F) on or before...
10% chanceSep 23
20% chanceSep 28
30% chanceOct 1
40% chanceOct 4
50% chanceOct 7
60% chanceOct 11
70% chanceOct 13
80% chanceOct 17
90% chanceOct 22
Probability of moderate freeze (28°F) on or before...
10% chanceOct 1
20% chanceOct 7
30% chanceOct 11
40% chanceOct 15
50% chanceOct 18
60% chanceOct 21
70% chanceOct 24
80% chanceOct 27
90% chanceNov 1
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 11
20% chanceOct 18
30% chanceOct 21
40% chanceOct 25
50% chanceOct 28
60% chanceOct 31
70% chanceNov 3
80% chanceNov 7
90% chanceNov 12
Probability of hard freeze (20°F) on or before...
10% chanceOct 22
20% chanceOct 28
30% chanceNov 1
40% chanceNov 3
50% chanceNov 6
60% chanceNov 9
70% chanceNov 13
80% chanceNov 17
90% chanceNov 23
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 1
20% chanceNov 5
30% chanceNov 9
40% chanceNov 12
50% chanceNov 15
60% chanceNov 19
70% chanceNov 23
80% chanceNov 28
90% chanceDec 3

Agricultural climatic data from weather station: FREMONT (USC00253050)

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