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🍂 First Frost Dates for Harper, Texas 78631

The first 36°F frost date is 30% likely to be on Oct 22. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Nov 1. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Harper, TX 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 11
20% chanceOct 19
30% chanceOct 22
40% chanceOct 26
50% chanceOct 29
60% chanceNov 1
70% chanceNov 4
80% chanceNov 8
90% chanceNov 13
Probability of light freeze (32°F) on or before...
10% chanceOct 23
20% chanceOct 29
30% chanceNov 1
40% chanceNov 5
50% chanceNov 8
60% chanceNov 11
70% chanceNov 15
80% chanceNov 19
90% chanceNov 25
Probability of moderate freeze (28°F) on or before...
10% chanceNov 1
20% chanceNov 7
30% chanceNov 12
40% chanceNov 16
50% chanceNov 20
60% chanceNov 24
70% chanceNov 28
80% chanceDec 2
90% chanceDec 8
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 12
20% chanceNov 19
30% chanceNov 25
40% chanceNov 30
50% chanceDec 3
60% chanceDec 6
70% chanceDec 10
80% chanceDec 17
90% chanceDec 27
Probability of hard freeze (20°F) on or before...
10% chanceNov 25
20% chanceDec 2
30% chanceDec 7
40% chanceDec 12
50% chanceDec 18
60% chanceDec 24
70% chanceDec 29
80% chanceJan 5
90% chanceJan 20
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 5
20% chanceDec 11
30% chanceDec 19
40% chanceDec 25
50% chanceDec 30
60% chanceJan 4
70% chanceJan 11
80% chanceJan 21
90% chanceFeb 6

Agricultural climatic data from weather station: KERRVILLE 3 NNE (USC00414782)

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