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🍂 First Frost Dates for Saltese, Montana 59867

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 Saltese, 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% chanceSep 9
20% chanceSep 15
30% chanceSep 19
40% chanceSep 22
50% chanceSep 25
60% chanceSep 27
70% chanceSep 30
80% chanceOct 2
90% chanceOct 6
Probability of moderate freeze (28°F) on or before...
10% chanceSep 22
20% chanceSep 28
30% chanceOct 1
40% chanceOct 3
50% chanceOct 5
60% chanceOct 7
70% chanceOct 10
80% chanceOct 13
90% chanceOct 17
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 2
20% chanceOct 7
30% chanceOct 11
40% chanceOct 14
50% chanceOct 16
60% chanceOct 19
70% chanceOct 22
80% chanceOct 25
90% chanceOct 30
Probability of hard freeze (20°F) on or before...
10% chanceOct 13
20% chanceOct 18
30% chanceOct 22
40% chanceOct 25
50% chanceOct 29
60% chanceOct 31
70% chanceNov 3
80% chanceNov 8
90% chanceNov 14
Probability of severe hard freeze (16°F) on or before...
10% chanceOct 20
20% chanceOct 27
30% chanceNov 1
40% chanceNov 5
50% chanceNov 9
60% chanceNov 13
70% chanceNov 17
80% chanceNov 21
90% chanceNov 26

Agricultural climatic data from weather station: MULLAN PASS VOR/DME (USW00024154)

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