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🍂 First Frost Dates for Clarkston, Utah 84305

The first 36°F frost date is 30% likely to be on Sep 23. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 3. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Clarkston, UT 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 13
20% chanceSep 18
30% chanceSep 23
40% chanceSep 26
50% chanceSep 29
60% chanceOct 2
70% chanceOct 5
80% chanceOct 8
90% chanceOct 13
Probability of light freeze (32°F) on or before...
10% chanceSep 24
20% chanceSep 30
30% chanceOct 3
40% chanceOct 6
50% chanceOct 10
60% chanceOct 13
70% chanceOct 17
80% chanceOct 21
90% chanceOct 27
Probability of moderate freeze (28°F) on or before...
10% chanceOct 5
20% chanceOct 13
30% chanceOct 19
40% chanceOct 22
50% chanceOct 25
60% chanceOct 28
70% chanceNov 1
80% chanceNov 4
90% chanceNov 9
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 22
20% chanceOct 27
30% chanceOct 31
40% chanceNov 3
50% chanceNov 7
60% chanceNov 10
70% chanceNov 14
80% chanceNov 17
90% chanceNov 22
Probability of hard freeze (20°F) on or before...
10% chanceOct 31
20% chanceNov 5
30% chanceNov 11
40% chanceNov 15
50% chanceNov 18
60% chanceNov 21
70% chanceNov 24
80% chanceNov 28
90% chanceDec 1
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 10
20% chanceNov 16
30% chanceNov 21
40% chanceNov 24
50% chanceNov 28
60% chanceDec 1
70% chanceDec 3
80% chanceDec 7
90% chanceDec 13

Agricultural climatic data from weather station: CUTLER DAM UP&L (USC00421918)

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