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🍂 First Frost Dates for Hanford, California 93230

The first 36°F frost date is 30% likely to be on Nov 10. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Nov 23. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Hanford, 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% chanceNov 1
20% chanceNov 6
30% chanceNov 10
40% chanceNov 13
50% chanceNov 15
60% chanceNov 18
70% chanceNov 21
80% chanceNov 25
90% chanceNov 30
Probability of light freeze (32°F) on or before...
10% chanceNov 15
20% chanceNov 19
30% chanceNov 23
40% chanceNov 26
50% chanceNov 30
60% chanceDec 2
70% chanceDec 5
80% chanceDec 10
90% chanceDec 21
Probability of moderate freeze (28°F) on or before...
10% chanceNov 27
20% chanceDec 1
30% chanceDec 5
40% chanceDec 9
50% chanceDec 14
60% chanceDec 20
70% chanceDec 29
80% chanceJan 4
90% chanceJan 16
Probability of moderate hard freeze (24°F) on or before...
10% chanceDec 5
20% chanceDec 10
30% chanceDec 14
40% chanceDec 19
50% chanceDec 27
60% chanceJan 1
70% chanceJan 5
80% chanceJan 11
90% chanceJan 25
Probability of hard freeze (20°F) on or before...
10% chancerarely
20% chancerarely
30% chancerarely
40% chancerarely
50% chancerarely
60% chancerarely
70% chancerarely
80% chancerarely
90% chancerarely
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: HANFORD 1 S (USC00043747)

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