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🍂 First Frost Dates for Hayfork, California 96041

The first 36°F frost date is 30% likely to be on Oct 5. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 22. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Hayfork, 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 29
20% chanceOct 2
30% chanceOct 5
40% chanceOct 8
50% chanceOct 12
60% chanceOct 16
70% chanceOct 20
80% chanceOct 25
90% chanceNov 1
Probability of light freeze (32°F) on or before...
10% chanceOct 9
20% chanceOct 16
30% chanceOct 22
40% chanceOct 27
50% chanceNov 1
60% chanceNov 5
70% chanceNov 12
80% chanceNov 19
90% chanceDec 1
Probability of moderate freeze (28°F) on or before...
10% chanceOct 24
20% chanceNov 2
30% chanceNov 12
40% chanceNov 21
50% chanceNov 29
60% chanceDec 6
70% chanceDec 13
80% chanceDec 23
90% chanceJan 5
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 22
20% chanceDec 6
30% chanceDec 14
40% chanceDec 23
50% chanceDec 31
60% chanceJan 6
70% chanceJan 19
80% chanceJan 30
90% chanceFeb 12
Probability of hard freeze (20°F) on or before...
10% chanceDec 13
20% chanceDec 21
30% chanceDec 30
40% chanceJan 3
50% chanceJan 14
60% chanceJan 22
70% chanceJan 28
80% chanceFeb 1
90% chanceFeb 9
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: BIG BAR 4 E (USC00040738)

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