🌷 Your Ultimate Garden Calendar!

🍂 First Frost Dates for Lost Springs, Wyoming 82224

The first 36°F frost date is 30% likely to be on Sep 10. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Sep 18. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Lost Springs, 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 3
20% chanceSep 7
30% chanceSep 10
40% chanceSep 13
50% chanceSep 15
60% chanceSep 18
70% chanceSep 20
80% chanceSep 23
90% chanceSep 27
Probability of light freeze (32°F) on or before...
10% chanceSep 10
20% chanceSep 15
30% chanceSep 18
40% chanceSep 20
50% chanceSep 23
60% chanceSep 26
70% chanceSep 28
80% chanceOct 1
90% chanceOct 5
Probability of moderate freeze (28°F) on or before...
10% chanceSep 17
20% chanceSep 22
30% chanceSep 26
40% chanceSep 28
50% chanceOct 1
60% chanceOct 4
70% chanceOct 6
80% chanceOct 10
90% chanceOct 14
Probability of moderate hard freeze (24°F) on or before...
10% chanceSep 24
20% chanceSep 30
30% chanceOct 4
40% chanceOct 7
50% chanceOct 10
60% chanceOct 13
70% chanceOct 16
80% chanceOct 19
90% chanceOct 23
Probability of hard freeze (20°F) on or before...
10% chanceOct 3
20% chanceOct 9
30% chanceOct 14
40% chanceOct 17
50% chanceOct 20
60% chanceOct 22
70% chanceOct 25
80% chanceOct 27
90% chanceOct 31
Probability of severe hard freeze (16°F) on or before...
10% chanceOct 13
20% chanceOct 19
30% chanceOct 23
40% chanceOct 25
50% chanceOct 28
60% chanceOct 31
70% chanceNov 2
80% chanceNov 5
90% chanceNov 11

Agricultural climatic data from weather station: KEELINE 7SW (USC00485088)

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