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🍂 First Frost Dates for Broomall, Pennsylvania 19008

The first 36°F frost date is 30% likely to be on Oct 3. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 14. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Broomall, 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 28
20% chanceOct 1
30% chanceOct 3
40% chanceOct 6
50% chanceOct 8
60% chanceOct 11
70% chanceOct 14
80% chanceOct 17
90% chanceOct 23
Probability of light freeze (32°F) on or before...
10% chanceOct 6
20% chanceOct 10
30% chanceOct 14
40% chanceOct 17
50% chanceOct 20
60% chanceOct 23
70% chanceOct 27
80% chanceNov 1
90% chanceNov 5
Probability of moderate freeze (28°F) on or before...
10% chanceOct 17
20% chanceOct 22
30% chanceOct 26
40% chanceOct 30
50% chanceNov 1
60% chanceNov 4
70% chanceNov 8
80% chanceNov 12
90% chanceNov 18
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 31
20% chanceNov 5
30% chanceNov 10
40% chanceNov 13
50% chanceNov 17
60% chanceNov 20
70% chanceNov 24
80% chanceNov 29
90% chanceDec 4
Probability of hard freeze (20°F) on or before...
10% chanceNov 13
20% chanceNov 19
30% chanceNov 24
40% chanceNov 28
50% chanceDec 1
60% chanceDec 4
70% chanceDec 7
80% chanceDec 12
90% chanceDec 19
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 27
20% chanceDec 1
30% chanceDec 5
40% chanceDec 9
50% chanceDec 13
60% chanceDec 17
70% chanceDec 21
80% chanceDec 26
90% chanceJan 1

Agricultural climatic data from weather station: VALLEY FORGE NHP (USC00369103)

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