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🍂 First Frost Dates for Kleinfeltersville, Pennsylvania 17039

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 16. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Kleinfeltersville, PA 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 7
50% chanceOct 9
60% chanceOct 12
70% chanceOct 15
80% chanceOct 19
90% chanceOct 24
Probability of light freeze (32°F) on or before...
10% chanceOct 8
20% chanceOct 12
30% chanceOct 16
40% chanceOct 19
50% chanceOct 22
60% chanceOct 25
70% chanceOct 28
80% chanceNov 1
90% chanceNov 5
Probability of moderate freeze (28°F) on or before...
10% chanceOct 19
20% chanceOct 25
30% chanceOct 28
40% chanceNov 1
50% chanceNov 3
60% chanceNov 6
70% chanceNov 9
80% chanceNov 13
90% chanceNov 19
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 1
20% chanceNov 6
30% chanceNov 10
40% chanceNov 13
50% chanceNov 17
60% chanceNov 20
70% chanceNov 23
80% chanceNov 28
90% chanceDec 4
Probability of hard freeze (20°F) on or before...
10% chanceNov 12
20% chanceNov 18
30% chanceNov 23
40% chanceNov 27
50% chanceDec 1
60% chanceDec 3
70% chanceDec 7
80% chanceDec 12
90% chanceDec 18
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 26
20% chanceDec 1
30% chanceDec 6
40% chanceDec 9
50% chanceDec 13
60% chanceDec 17
70% chanceDec 21
80% chanceDec 26
90% chanceJan 1

Agricultural climatic data from weather station: LANCASTER AP (USW00054737)

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