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🍂 First Frost Dates for Anacortes, Washington 98221

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

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

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Anacortes, WA 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% chanceOct 15
20% chanceOct 20
30% chanceOct 23
40% chanceOct 27
50% chanceOct 31
60% chanceNov 3
70% chanceNov 7
80% chanceNov 11
90% chanceNov 18
Probability of light freeze (32°F) on or before...
10% chanceOct 30
20% chanceNov 4
30% chanceNov 9
40% chanceNov 14
50% chanceNov 19
60% chanceNov 23
70% chanceNov 28
80% chanceDec 2
90% chanceDec 9
Probability of moderate freeze (28°F) on or before...
10% chanceNov 12
20% chanceNov 21
30% chanceNov 27
40% chanceDec 1
50% chanceDec 6
60% chanceDec 12
70% chanceDec 18
80% chanceDec 25
90% chanceJan 3
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 25
20% chanceDec 3
30% chanceDec 9
40% chanceDec 15
50% chanceDec 20
60% chanceDec 27
70% chanceJan 1
80% chanceJan 10
90% chanceJan 27
Probability of hard freeze (20°F) on or before...
10% chanceDec 1
20% chanceDec 8
30% chanceDec 15
40% chanceDec 21
50% chanceDec 26
60% chanceDec 31
70% chanceJan 3
80% chanceJan 12
90% chanceJan 28
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 5
20% chanceDec 12
30% chanceDec 19
40% chanceDec 24
50% chanceDec 28
60% chanceDec 31
70% chanceJan 3
80% chanceJan 9
90% chanceJan 19

Agricultural climatic data from weather station: ANACORTES (USC00450176)

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