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🍂 First Frost Dates for Wrightwood, California 92397

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 4. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Wrightwood, CA 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 10
20% chanceSep 18
30% chanceSep 23
40% chanceSep 26
50% chanceSep 30
60% chanceOct 2
70% chanceOct 5
80% chanceOct 9
90% chanceOct 14
Probability of light freeze (32°F) on or before...
10% chanceSep 25
20% chanceOct 1
30% chanceOct 4
40% chanceOct 7
50% chanceOct 10
60% chanceOct 13
70% chanceOct 16
80% chanceOct 20
90% chanceOct 28
Probability of moderate freeze (28°F) on or before...
10% chanceOct 7
20% chanceOct 12
30% chanceOct 16
40% chanceOct 20
50% chanceOct 24
60% chanceOct 28
70% chanceNov 1
80% chanceNov 4
90% chanceNov 9
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 19
20% chanceOct 27
30% chanceNov 1
40% chanceNov 5
50% chanceNov 9
60% chanceNov 13
70% chanceNov 17
80% chanceNov 20
90% chanceNov 26
Probability of hard freeze (20°F) on or before...
10% chanceNov 6
20% chanceNov 14
30% chanceNov 19
40% chanceNov 23
50% chanceNov 26
60% chanceNov 30
70% chanceDec 2
80% chanceDec 6
90% chanceDec 13
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 24
20% chanceNov 30
30% chanceDec 3
40% chanceDec 7
50% chanceDec 11
60% chanceDec 15
70% chanceDec 22
80% chanceDec 31
90% chanceJan 17

Agricultural climatic data from weather station: WRIGHTWOOD (USC00049822)

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