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🍂 First Frost Dates for Adams, Oregon 97810

The first 36°F frost date is 30% likely to be on Sep 6. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Sep 21. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

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

Agricultural climatic data from weather station: PENDLETON BR EXP STN (USC00356540)

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