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🍂 First Frost Dates for Rosamond, California 93560

The first 36°F frost date is 30% likely to be on Oct 16. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 28. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Rosamond, 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% chanceOct 9
20% chanceOct 13
30% chanceOct 16
40% chanceOct 19
50% chanceOct 22
60% chanceOct 25
70% chanceOct 28
80% chanceNov 1
90% chanceNov 4
Probability of light freeze (32°F) on or before...
10% chanceOct 18
20% chanceOct 24
30% chanceOct 28
40% chanceOct 31
50% chanceNov 2
60% chanceNov 5
70% chanceNov 7
80% chanceNov 11
90% chanceNov 15
Probability of moderate freeze (28°F) on or before...
10% chanceOct 31
20% chanceNov 4
30% chanceNov 7
40% chanceNov 10
50% chanceNov 13
60% chanceNov 16
70% chanceNov 19
80% chanceNov 23
90% chanceNov 29
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 10
20% chanceNov 15
30% chanceNov 19
40% chanceNov 24
50% chanceNov 27
60% chanceDec 1
70% chanceDec 3
80% chanceDec 6
90% chanceDec 13
Probability of hard freeze (20°F) on or before...
10% chanceNov 23
20% chanceNov 29
30% chanceDec 2
40% chanceDec 5
50% chanceDec 8
60% chanceDec 12
70% chanceDec 18
80% chanceDec 26
90% chanceJan 4
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 1
20% chanceDec 7
30% chanceDec 12
40% chanceDec 16
50% chanceDec 21
60% chanceDec 26
70% chanceJan 1
80% chanceJan 7
90% chanceJan 22

Agricultural climatic data from weather station: LANCASTER WM J FOX FLD (USW00003159)

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