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🍂 First Frost Dates for Santa Ysabel, California 92070

A 36°F frost is always a risk here. (See detailed probabilities below.)

A 32°F light freeze is always a risk here. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Santa Ysabel, 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% chancealways
20% chancealways
30% chancealways
40% chancealways
50% chancealways
60% chancealways
70% chancealways
80% chancealways
90% chancealways
Probability of light freeze (32°F) on or before...
10% chancealways
20% chancealways
30% chancealways
40% chancealways
50% chancealways
60% chancealways
70% chancealways
80% chancealways
90% chancealways
Probability of moderate freeze (28°F) on or before...
10% chanceOct 11
20% chanceOct 16
30% chanceOct 20
40% chanceOct 23
50% chanceOct 26
60% chanceOct 30
70% chanceNov 3
80% chanceNov 7
90% chanceNov 13
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 25
20% chanceNov 1
30% chanceNov 6
40% chanceNov 10
50% chanceNov 15
60% chanceNov 18
70% chanceNov 22
80% chanceNov 27
90% chanceDec 2
Probability of hard freeze (20°F) on or before...
10% chanceNov 15
20% chanceNov 22
30% chanceNov 27
40% chanceDec 1
50% chanceDec 4
60% chanceDec 8
70% chanceDec 12
80% chanceDec 18
90% chanceDec 29
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 30
20% chanceDec 5
30% chanceDec 10
40% chanceDec 14
50% chanceDec 19
60% chanceDec 25
70% chanceJan 1
80% chanceJan 7
90% chanceJan 27

Agricultural climatic data from weather station: HENSHAW DAM (USC00043914)

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