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🍂 First Frost Dates for Eugene, Oregon 97401

The first 36°F frost date is 30% likely to be on Sep 28. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 14. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Eugene, 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% chanceSep 17
20% chanceSep 23
30% chanceSep 28
40% chanceOct 1
50% chanceOct 4
60% chanceOct 7
70% chanceOct 11
80% chanceOct 15
90% chanceOct 21
Probability of light freeze (32°F) on or before...
10% chanceOct 3
20% chanceOct 9
30% chanceOct 14
40% chanceOct 18
50% chanceOct 22
60% chanceOct 26
70% chanceOct 29
80% chanceNov 3
90% chanceNov 12
Probability of moderate freeze (28°F) on or before...
10% chanceOct 19
20% chanceOct 27
30% chanceNov 1
40% chanceNov 6
50% chanceNov 12
60% chanceNov 20
70% chanceNov 28
80% chanceDec 5
90% chanceDec 15
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 2
20% chanceNov 12
30% chanceNov 24
40% chanceDec 2
50% chanceDec 8
60% chanceDec 15
70% chanceDec 23
80% chanceDec 30
90% chanceJan 14
Probability of hard freeze (20°F) on or before...
10% chanceNov 14
20% chanceDec 1
30% chanceDec 9
40% chanceDec 16
50% chanceDec 25
60% chanceDec 30
70% chanceJan 6
80% chanceJan 19
90% chanceFeb 1
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 1
20% chanceDec 10
30% chanceDec 15
40% chanceDec 22
50% chanceDec 27
60% chanceDec 31
70% chanceJan 5
80% chanceJan 20
90% chanceFeb 1

Agricultural climatic data from weather station: EUGENE MAHLON SWEET AP (USW00024221)

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