๐Ÿ‚ First Frost Dates for Seward, Alaska 99664

The first 36ยฐF frost date is 30% likely to be on Sep 23. (See detailed probabilities below.)

The first 32ยฐF light freeze date is 30% likely to be on Oct 4. (See detailed probabilities below.)

(See also ๐ŸŒท Last Spring Frost Dates.)

First frost date probabilities for Seward, AK are based on historical climate data.

Always check your local forecast for the most up-to-date frost warnings.

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 sweaterโ€”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 (36ยฐF) on or before...
10% chanceSep 15
20% chanceSep 20
30% chanceSep 23
40% chanceSep 26
50% chanceSep 28
60% chanceSep 30
70% chanceOct 2
80% chanceOct 5
90% chanceOct 10
Probability of light freeze (32ยฐF) on or before...
10% chanceSep 29
20% chanceOct 2
30% chanceOct 4
40% chanceOct 7
50% chanceOct 10
60% chanceOct 13
70% chanceOct 16
80% chanceOct 19
90% chanceOct 24
Probability of moderate freeze (28ยฐF) on or before...
10% chanceOct 8
20% chanceOct 13
30% chanceOct 16
40% chanceOct 19
50% chanceOct 22
60% chanceOct 25
70% chanceOct 28
80% chanceOct 31
90% chanceNov 4
Probability of moderate hard freeze (24ยฐF) on or before...
10% chanceOct 18
20% chanceOct 23
30% chanceOct 27
40% chanceOct 30
50% chanceNov 1
60% chanceNov 3
70% chanceNov 7
80% chanceNov 10
90% chanceNov 15
Probability of hard freeze (20ยฐF) on or before...
10% chanceOct 27
20% chanceNov 1
30% chanceNov 3
40% chanceNov 7
50% chanceNov 9
60% chanceNov 12
70% chanceNov 16
80% chanceNov 20
90% chanceNov 26
Probability of severe hard freeze (16ยฐF) on or before...
10% chanceNov 1
20% chanceNov 8
30% chanceNov 12
40% chanceNov 16
50% chanceNov 20
60% chanceNov 24
70% chanceNov 29
80% chanceDec 3
90% chanceDec 13

Agricultural climatic data from weather station: SEWARD AP (USW00026438)