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🍂 First Frost Dates for Rush Valley, Utah 84069

The first 36°F frost date is 30% likely to be on Sep 18. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Sep 27. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Rush Valley, 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 9
20% chanceSep 14
30% chanceSep 18
40% chanceSep 21
50% chanceSep 23
60% chanceSep 25
70% chanceSep 28
80% chanceOct 1
90% chanceOct 5
Probability of light freeze (32°F) on or before...
10% chanceSep 18
20% chanceSep 24
30% chanceSep 27
40% chanceSep 30
50% chanceOct 3
60% chanceOct 6
70% chanceOct 9
80% chanceOct 14
90% chanceOct 20
Probability of moderate freeze (28°F) on or before...
10% chanceSep 30
20% chanceOct 4
30% chanceOct 8
40% chanceOct 11
50% chanceOct 15
60% chanceOct 19
70% chanceOct 23
80% chanceOct 26
90% chanceNov 1
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 9
20% chanceOct 16
30% chanceOct 20
40% chanceOct 24
50% chanceOct 28
60% chanceOct 31
70% chanceNov 3
80% chanceNov 8
90% chanceNov 13
Probability of hard freeze (20°F) on or before...
10% chanceOct 22
20% chanceOct 28
30% chanceNov 1
40% chanceNov 5
50% chanceNov 8
60% chanceNov 12
70% chanceNov 15
80% chanceNov 18
90% chanceNov 23
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 1
20% chanceNov 7
30% chanceNov 12
40% chanceNov 15
50% chanceNov 18
60% chanceNov 21
70% chanceNov 25
80% chanceNov 28
90% chanceDec 3

Agricultural climatic data from weather station: JOHNSON PASS (USC00424362)

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