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🍂 First Frost Dates for Skagway, Alaska 99840

The first 36°F frost date is 30% likely to be on Sep 25. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 9. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Skagway, AK 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 16
20% chanceSep 21
30% chanceSep 25
40% chanceSep 28
50% chanceOct 1
60% chanceOct 4
70% chanceOct 7
80% chanceOct 11
90% chanceOct 16
Probability of light freeze (32°F) on or before...
10% chanceSep 29
20% chanceOct 4
30% chanceOct 9
40% chanceOct 13
50% chanceOct 16
60% chanceOct 19
70% chanceOct 22
80% chanceOct 25
90% chanceOct 29
Probability of moderate freeze (28°F) on or before...
10% chanceOct 12
20% chanceOct 19
30% chanceOct 24
40% chanceOct 27
50% chanceOct 30
60% chanceNov 2
70% chanceNov 5
80% chanceNov 9
90% chanceNov 16
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 28
20% chanceNov 2
30% chanceNov 6
40% chanceNov 9
50% chanceNov 13
60% chanceNov 17
70% chanceNov 21
80% chanceNov 27
90% chanceDec 5
Probability of hard freeze (20°F) on or before...
10% chanceNov 6
20% chanceNov 11
30% chanceNov 16
40% chanceNov 20
50% chanceNov 24
60% chanceNov 29
70% chanceDec 4
80% chanceDec 11
90% chanceDec 20
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 14
20% chanceNov 20
30% chanceNov 25
40% chanceDec 1
50% chanceDec 5
60% chanceDec 11
70% chanceDec 18
80% chanceDec 25
90% chanceJan 1

Agricultural climatic data from weather station: SKAGWAY AP (USW00025335)

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