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🍂 First Frost Dates for Warrenton, Oregon 97146

The first 36°F frost date is 30% likely to be on Oct 15. (See detailed probabilities below.)

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

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Warrenton, OR 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 4
20% chanceOct 9
30% chanceOct 15
40% chanceOct 19
50% chanceOct 23
60% chanceOct 27
70% chanceOct 31
80% chanceNov 4
90% chanceNov 11
Probability of light freeze (32°F) on or before...
10% chanceOct 25
20% chanceOct 31
30% chanceNov 4
40% chanceNov 9
50% chanceNov 13
60% chanceNov 19
70% chanceNov 25
80% chanceDec 2
90% chanceDec 12
Probability of moderate freeze (28°F) on or before...
10% chanceNov 11
20% chanceNov 21
30% chanceNov 30
40% chanceDec 7
50% chanceDec 14
60% chanceDec 22
70% chanceDec 30
80% chanceJan 7
90% chanceJan 26
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 28
20% chanceDec 9
30% chanceDec 19
40% chanceDec 27
50% chanceJan 1
60% chanceJan 8
70% chanceJan 19
80% chanceJan 30
90% chanceFeb 9
Probability of hard freeze (20°F) on or before...
10% chanceDec 9
20% chanceDec 17
30% chanceDec 24
40% chanceDec 29
50% chanceJan 1
60% chanceJan 6
70% chanceJan 17
80% chanceJan 27
90% chanceFeb 6
Probability of severe hard freeze (16°F) on or before...
10% chancerarely
20% chancerarely
30% chancerarely
40% chancerarely
50% chancerarely
60% chancerarely
70% chancerarely
80% chancerarely
90% chancerarely

Agricultural climatic data from weather station: FT CLATSOP NATL MEM (USC00353014)

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