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🍂 First Frost Dates for Hesperia, California 92345

The first 36°F frost date is 30% likely to be on Oct 6. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 21. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Hesperia, 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 27
20% chanceOct 2
30% chanceOct 6
40% chanceOct 10
50% chanceOct 14
60% chanceOct 18
70% chanceOct 23
80% chanceOct 30
90% chanceNov 4
Probability of light freeze (32°F) on or before...
10% chanceOct 9
20% chanceOct 16
30% chanceOct 21
40% chanceOct 26
50% chanceOct 31
60% chanceNov 3
70% chanceNov 7
80% chanceNov 11
90% chanceNov 16
Probability of moderate freeze (28°F) on or before...
10% chanceOct 25
20% chanceNov 2
30% chanceNov 7
40% chanceNov 12
50% chanceNov 16
60% chanceNov 19
70% chanceNov 22
80% chanceNov 27
90% chanceDec 2
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 9
20% chanceNov 18
30% chanceNov 23
40% chanceNov 27
50% chanceDec 1
60% chanceDec 4
70% chanceDec 8
80% chanceDec 13
90% chanceDec 21
Probability of hard freeze (20°F) on or before...
10% chanceNov 24
20% chanceDec 2
30% chanceDec 8
40% chanceDec 13
50% chanceDec 18
60% chanceDec 22
70% chanceDec 28
80% chanceJan 5
90% chanceJan 23
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 6
20% chanceDec 15
30% chanceDec 22
40% chanceDec 28
50% chanceJan 2
60% chanceJan 9
70% chanceJan 19
80% chanceFeb 1
90% chanceFeb 18

Agricultural climatic data from weather station: LAKE ARROWHEAD (USC00044671)

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