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🍂 First Frost Dates for Groveland, California 95321

The first 36°F frost date is 30% likely to be on Oct 15. (See detailed probabilities below.)

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

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Groveland, 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 5
20% chanceOct 11
30% chanceOct 15
40% chanceOct 19
50% chanceOct 23
60% chanceOct 26
70% chanceNov 1
80% chanceNov 4
90% chanceNov 9
Probability of light freeze (32°F) on or before...
10% chanceOct 19
20% chanceOct 25
30% chanceOct 30
40% chanceNov 3
50% chanceNov 7
60% chanceNov 11
70% chanceNov 14
80% chanceNov 18
90% chanceNov 23
Probability of moderate freeze (28°F) on or before...
10% chanceNov 4
20% chanceNov 11
30% chanceNov 16
40% chanceNov 20
50% chanceNov 24
60% chanceNov 27
70% chanceDec 1
80% chanceDec 6
90% chanceDec 13
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 21
20% chanceNov 29
30% chanceDec 3
40% chanceDec 8
50% chanceDec 12
60% chanceDec 18
70% chanceDec 24
80% chanceJan 1
90% chanceJan 15
Probability of hard freeze (20°F) on or before...
10% chanceDec 5
20% chanceDec 13
30% chanceDec 21
40% chanceDec 27
50% chanceJan 1
60% chanceJan 6
70% chanceJan 16
80% chanceJan 30
90% chanceFeb 18
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 11
20% chanceDec 21
30% chanceDec 27
40% chanceDec 31
50% chanceJan 4
60% chanceJan 13
70% chanceJan 26
80% chanceFeb 8
90% chanceFeb 21

Agricultural climatic data from weather station: HETCH HETCHY (USC00043939)

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