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🍂 First Frost Dates for Orofino, Idaho 83544

The first 36°F frost date is 30% likely to be on Sep 29. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 10. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Orofino, ID 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 26
30% chanceSep 29
40% chanceOct 1
50% chanceOct 4
60% chanceOct 7
70% chanceOct 10
80% chanceOct 14
90% chanceOct 19
Probability of light freeze (32°F) on or before...
10% chanceSep 30
20% chanceOct 5
30% chanceOct 10
40% chanceOct 15
50% chanceOct 19
60% chanceOct 22
70% chanceOct 26
80% chanceOct 31
90% chanceNov 5
Probability of moderate freeze (28°F) on or before...
10% chanceOct 13
20% chanceOct 21
30% chanceOct 26
40% chanceOct 31
50% chanceNov 3
60% chanceNov 8
70% chanceNov 14
80% chanceNov 21
90% chanceNov 29
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 25
20% chanceNov 3
30% chanceNov 11
40% chanceNov 17
50% chanceNov 24
60% chanceNov 30
70% chanceDec 4
80% chanceDec 9
90% chanceDec 17
Probability of hard freeze (20°F) on or before...
10% chanceNov 10
20% chanceNov 21
30% chanceNov 28
40% chanceDec 4
50% chanceDec 8
60% chanceDec 14
70% chanceDec 20
80% chanceDec 28
90% chanceJan 7
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 26
20% chanceDec 5
30% chanceDec 10
40% chanceDec 17
50% chanceDec 23
60% chanceDec 30
70% chanceJan 4
80% chanceJan 14
90% chanceJan 27

Agricultural climatic data from weather station: DWORSHAK FISH HATCH (USC00102845)

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