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🍂 First Frost Dates for Pierce, Idaho 83546

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 6. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

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

Agricultural climatic data from weather station: HEADQUARTERS (USC00104150)

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