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🍂 First Frost Dates for Happy Jack, Arizona 86024

The first 36°F frost date is 30% likely to be on Sep 15. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Sep 25. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Happy Jack, AZ 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 5
20% chanceSep 11
30% chanceSep 15
40% chanceSep 18
50% chanceSep 21
60% chanceSep 23
70% chanceSep 26
80% chanceSep 29
90% chanceOct 2
Probability of light freeze (32°F) on or before...
10% chanceSep 17
20% chanceSep 22
30% chanceSep 25
40% chanceSep 28
50% chanceOct 1
60% chanceOct 2
70% chanceOct 4
80% chanceOct 7
90% chanceOct 11
Probability of moderate freeze (28°F) on or before...
10% chanceSep 28
20% chanceOct 2
30% chanceOct 4
40% chanceOct 7
50% chanceOct 9
60% chanceOct 12
70% chanceOct 15
80% chanceOct 18
90% chanceOct 23
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 6
20% chanceOct 11
30% chanceOct 15
40% chanceOct 18
50% chanceOct 21
60% chanceOct 24
70% chanceOct 27
80% chanceNov 1
90% chanceNov 4
Probability of hard freeze (20°F) on or before...
10% chanceOct 17
20% chanceOct 22
30% chanceOct 26
40% chanceOct 30
50% chanceNov 1
60% chanceNov 4
70% chanceNov 7
80% chanceNov 11
90% chanceNov 16
Probability of severe hard freeze (16°F) on or before...
10% chanceOct 28
20% chanceNov 2
30% chanceNov 5
40% chanceNov 10
50% chanceNov 14
60% chanceNov 17
70% chanceNov 19
80% chanceNov 23
90% chanceNov 27

Agricultural climatic data from weather station: BLUE RIDGE RS (USC00020871)

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