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🍂 First Frost Dates for Idanha, Oregon 97350

A 36°F frost is always a risk here. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Sep 19. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Idanha, 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% chancealways
20% chancealways
30% chancealways
40% chancealways
50% chancealways
60% chancealways
70% chancealways
80% chancealways
90% chancealways
Probability of light freeze (32°F) on or before...
10% chanceSep 9
20% chanceSep 15
30% chanceSep 19
40% chanceSep 23
50% chanceSep 26
60% chanceSep 30
70% chanceOct 2
80% chanceOct 7
90% chanceOct 14
Probability of moderate freeze (28°F) on or before...
10% chanceSep 29
20% chanceOct 4
30% chanceOct 10
40% chanceOct 16
50% chanceOct 20
60% chanceOct 25
70% chanceOct 29
80% chanceNov 3
90% chanceNov 13
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 24
20% chanceNov 1
30% chanceNov 5
40% chanceNov 11
50% chanceNov 17
60% chanceNov 24
70% chanceDec 1
80% chanceDec 6
90% chanceDec 13
Probability of hard freeze (20°F) on or before...
10% chanceNov 8
20% chanceNov 18
30% chanceNov 29
40% chanceDec 4
50% chanceDec 9
60% chanceDec 14
70% chanceDec 21
80% chanceDec 29
90% chanceJan 8
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 22
20% chanceDec 5
30% chanceDec 12
40% chanceDec 20
50% chanceDec 27
60% chanceJan 1
70% chanceJan 9
80% chanceJan 20
90% chanceFeb 1

Agricultural climatic data from weather station: MARION FRKS FISH HATCH (USC00355221)

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