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🍂 First Frost Dates for Cathlamet, Washington 98612

The first 36°F frost date is 30% likely to be on Oct 1. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 16. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Cathlamet, 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 21
20% chanceSep 27
30% chanceOct 1
40% chanceOct 3
50% chanceOct 6
60% chanceOct 9
70% chanceOct 13
80% chanceOct 17
90% chanceOct 24
Probability of light freeze (32°F) on or before...
10% chanceOct 4
20% chanceOct 11
30% chanceOct 16
40% chanceOct 20
50% chanceOct 23
60% chanceOct 27
70% chanceOct 31
80% chanceNov 4
90% chanceNov 13
Probability of moderate freeze (28°F) on or before...
10% chanceOct 21
20% chanceOct 28
30% chanceNov 1
40% chanceNov 6
50% chanceNov 11
60% chanceNov 16
70% chanceNov 23
80% chanceDec 1
90% chanceDec 8
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 4
20% chanceNov 13
30% chanceNov 23
40% chanceDec 1
50% chanceDec 5
60% chanceDec 11
70% chanceDec 19
80% chanceDec 28
90% chanceJan 9
Probability of hard freeze (20°F) on or before...
10% chanceNov 18
20% chanceDec 2
30% chanceDec 9
40% chanceDec 17
50% chanceDec 26
60% chanceJan 1
70% chanceJan 9
80% chanceJan 21
90% chanceFeb 6
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 3
20% chanceDec 10
30% chanceDec 18
40% chanceDec 25
50% chanceDec 30
60% chanceJan 3
70% chanceJan 16
80% chanceJan 31
90% chanceFeb 10

Agricultural climatic data from weather station: CLATSKANIE (USC00351643)

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