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🍂 First Frost Dates for Ridgefield, Washington 98642

The first 36°F frost date is 30% likely to be on Sep 27. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 13. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Ridgefield, 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 17
20% chanceSep 24
30% chanceSep 27
40% chanceOct 1
50% chanceOct 3
60% chanceOct 6
70% chanceOct 9
80% chanceOct 14
90% chanceOct 21
Probability of light freeze (32°F) on or before...
10% chanceOct 2
20% chanceOct 7
30% chanceOct 13
40% chanceOct 17
50% chanceOct 21
60% chanceOct 24
70% chanceOct 29
80% chanceNov 3
90% chanceNov 12
Probability of moderate freeze (28°F) on or before...
10% chanceOct 19
20% chanceOct 25
30% chanceOct 31
40% chanceNov 4
50% chanceNov 10
60% chanceNov 16
70% chanceNov 22
80% chanceNov 28
90% chanceDec 6
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 31
20% chanceNov 10
30% chanceNov 17
40% chanceNov 26
50% chanceDec 1
60% chanceDec 7
70% chanceDec 13
80% chanceDec 21
90% chanceDec 30
Probability of hard freeze (20°F) on or before...
10% chanceNov 15
20% chanceNov 30
30% chanceDec 6
40% chanceDec 12
50% chanceDec 20
60% chanceDec 28
70% chanceJan 3
80% chanceJan 18
90% chanceFeb 3
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 1
20% chanceDec 9
30% chanceDec 15
40% chanceDec 22
50% chanceDec 28
60% chanceJan 2
70% chanceJan 17
80% chanceFeb 1
90% chanceFeb 11

Agricultural climatic data from weather station: VANCOUVER 4 NNE (USC00458773)

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