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🍂 First Frost Dates for Grand Canyon, Arizona 86023

The first 36°F frost date is 30% likely to be on Nov 21. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Dec 1. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Grand Canyon, 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% chanceNov 14
20% chanceNov 18
30% chanceNov 21
40% chanceNov 24
50% chanceNov 26
60% chanceNov 29
70% chanceDec 1
80% chanceDec 4
90% chanceDec 8
Probability of light freeze (32°F) on or before...
10% chanceNov 24
20% chanceNov 29
30% chanceDec 1
40% chanceDec 5
50% chanceDec 8
60% chanceDec 12
70% chanceDec 16
80% chanceDec 20
90% chanceDec 26
Probability of moderate freeze (28°F) on or before...
10% chanceDec 5
20% chanceDec 11
30% chanceDec 16
40% chanceDec 22
50% chanceDec 26
60% chanceJan 1
70% chanceJan 4
80% chanceJan 12
90% chanceJan 27
Probability of moderate hard freeze (24°F) on or before...
10% chanceDec 13
20% chanceDec 19
30% chanceDec 26
40% chanceDec 31
50% chanceJan 4
60% chanceJan 12
70% chanceJan 23
80% chanceJan 31
90% chanceFeb 6
Probability of hard freeze (20°F) on or before...
10% chancerarely
20% chancerarely
30% chancerarely
40% chancerarely
50% chancerarely
60% chancerarely
70% chancerarely
80% chancerarely
90% chancerarely
Probability of severe hard freeze (16°F) on or before...
10% chancerarely
20% chancerarely
30% chancerarely
40% chancerarely
50% chancerarely
60% chancerarely
70% chancerarely
80% chancerarely
90% chancerarely

Agricultural climatic data from weather station: PHANTOM RANCH (USC00026471)

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