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🍂 First Frost Dates for Burlington, Washington 98233

The first 36°F frost date is 30% likely to be on Oct 3. (See detailed probabilities below.)

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

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Burlington, 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% chanceSep 25
20% chanceOct 1
30% chanceOct 3
40% chanceOct 6
50% chanceOct 9
60% chanceOct 12
70% chanceOct 16
80% chanceOct 20
90% chanceOct 27
Probability of light freeze (32°F) on or before...
10% chanceOct 6
20% chanceOct 14
30% chanceOct 18
40% chanceOct 23
50% chanceOct 27
60% chanceNov 1
70% chanceNov 5
80% chanceNov 11
90% chanceNov 21
Probability of moderate freeze (28°F) on or before...
10% chanceOct 25
20% chanceNov 1
30% chanceNov 6
40% chanceNov 12
50% chanceNov 20
60% chanceNov 29
70% chanceDec 4
80% chanceDec 11
90% chanceDec 22
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 8
20% chanceNov 21
30% chanceDec 1
40% chanceDec 8
50% chanceDec 14
60% chanceDec 21
70% chanceDec 28
80% chanceJan 2
90% chanceJan 19
Probability of hard freeze (20°F) on or before...
10% chanceNov 27
20% chanceDec 7
30% chanceDec 16
40% chanceDec 22
50% chanceDec 28
60% chanceJan 1
70% chanceJan 7
80% chanceJan 19
90% chanceFeb 6
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 5
20% chanceDec 15
30% chanceDec 21
40% chanceDec 27
50% chanceDec 31
60% chanceJan 2
70% chanceJan 9
80% chanceJan 22
90% chanceFeb 15

Agricultural climatic data from weather station: MT VERNON 3 WNW (USC00455678)

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