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🍂 First Frost Dates for Markleton, Pennsylvania 15551

The first 36°F frost date is 30% likely to be on Sep 28. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 6. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Markleton, 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 19
20% chanceSep 24
30% chanceSep 28
40% chanceOct 1
50% chanceOct 2
60% chanceOct 4
70% chanceOct 7
80% chanceOct 10
90% chanceOct 15
Probability of light freeze (32°F) on or before...
10% chanceOct 1
20% chanceOct 4
30% chanceOct 6
40% chanceOct 9
50% chanceOct 12
60% chanceOct 15
70% chanceOct 18
80% chanceOct 22
90% chanceOct 26
Probability of moderate freeze (28°F) on or before...
10% chanceOct 9
20% chanceOct 14
30% chanceOct 17
40% chanceOct 20
50% chanceOct 23
60% chanceOct 26
70% chanceOct 29
80% chanceNov 1
90% chanceNov 6
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 20
20% chanceOct 24
30% chanceOct 28
40% chanceOct 31
50% chanceNov 2
60% chanceNov 5
70% chanceNov 8
80% chanceNov 13
90% chanceNov 19
Probability of hard freeze (20°F) on or before...
10% chanceOct 30
20% chanceNov 3
30% chanceNov 7
40% chanceNov 11
50% chanceNov 15
60% chanceNov 18
70% chanceNov 23
80% chanceNov 27
90% chanceDec 4
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 9
20% chanceNov 15
30% chanceNov 20
40% chanceNov 25
50% chanceNov 29
60% chanceDec 2
70% chanceDec 6
80% chanceDec 11
90% chanceDec 18

Agricultural climatic data from weather station: CONFLUENCE 1 SW DAM (USC00361705)

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