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🍂 First Frost Dates for Blue, Arizona 85922

The first 36°F frost date is 30% likely to be on Oct 5. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 16. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

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

Agricultural climatic data from weather station: GLENWOOD (USC00293577)

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