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🍂 First Frost Dates for Trout Creek, Montana 59874

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 9. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Trout Creek, MT 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 29
20% chanceSep 4
30% chanceSep 9
40% chanceSep 14
50% chanceSep 17
60% chanceSep 21
70% chanceSep 24
80% chanceSep 28
90% chanceOct 3
Probability of moderate freeze (28°F) on or before...
10% chanceSep 15
20% chanceSep 21
30% chanceSep 26
40% chanceSep 30
50% chanceOct 2
60% chanceOct 5
70% chanceOct 8
80% chanceOct 14
90% chanceOct 21
Probability of moderate hard freeze (24°F) on or before...
10% chanceSep 30
20% chanceOct 4
30% chanceOct 8
40% chanceOct 14
50% chanceOct 19
60% chanceOct 24
70% chanceOct 29
80% chanceNov 3
90% chanceNov 12
Probability of hard freeze (20°F) on or before...
10% chanceOct 9
20% chanceOct 20
30% chanceOct 27
40% chanceNov 1
50% chanceNov 5
60% chanceNov 10
70% chanceNov 17
80% chanceNov 24
90% chanceDec 1
Probability of severe hard freeze (16°F) on or before...
10% chanceOct 26
20% chanceNov 3
30% chanceNov 10
40% chanceNov 16
50% chanceNov 23
60% chanceNov 28
70% chanceDec 3
80% chanceDec 8
90% chanceDec 15

Agricultural climatic data from weather station: TROUT CREEK RS (USC00248380)

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