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🍂 First Frost Dates for Cheyenne, Wyoming 82001

The first 36°F frost date is 30% likely to be on Sep 17. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Sep 24. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Cheyenne, WY 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 10
20% chanceSep 14
30% chanceSep 17
40% chanceSep 20
50% chanceSep 22
60% chanceSep 24
70% chanceSep 26
80% chanceSep 29
90% chanceOct 3
Probability of light freeze (32°F) on or before...
10% chanceSep 15
20% chanceSep 21
30% chanceSep 24
40% chanceSep 27
50% chanceSep 30
60% chanceOct 2
70% chanceOct 5
80% chanceOct 8
90% chanceOct 13
Probability of moderate freeze (28°F) on or before...
10% chanceSep 21
20% chanceSep 28
30% chanceOct 1
40% chanceOct 5
50% chanceOct 8
60% chanceOct 11
70% chanceOct 14
80% chanceOct 18
90% chanceOct 22
Probability of moderate hard freeze (24°F) on or before...
10% chanceSep 29
20% chanceOct 5
30% chanceOct 10
40% chanceOct 14
50% chanceOct 18
60% chanceOct 21
70% chanceOct 24
80% chanceOct 27
90% chanceOct 31
Probability of hard freeze (20°F) on or before...
10% chanceOct 9
20% chanceOct 17
30% chanceOct 21
40% chanceOct 24
50% chanceOct 27
60% chanceOct 30
70% chanceNov 2
80% chanceNov 6
90% chanceNov 11
Probability of severe hard freeze (16°F) on or before...
10% chanceOct 19
20% chanceOct 25
30% chanceOct 29
40% chanceNov 1
50% chanceNov 5
60% chanceNov 8
70% chanceNov 12
80% chanceNov 16
90% chanceNov 21

Agricultural climatic data from weather station: CHEYENNE (USW00024018)

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