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🍂 First Frost Dates for Dublin, Pennsylvania 18917

The first 36°F frost date is 30% likely to be on Oct 7. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 18. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Dublin, 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% chanceOct 1
20% chanceOct 5
30% chanceOct 7
40% chanceOct 10
50% chanceOct 13
60% chanceOct 15
70% chanceOct 18
80% chanceOct 22
90% chanceOct 28
Probability of light freeze (32°F) on or before...
10% chanceOct 10
20% chanceOct 15
30% chanceOct 18
40% chanceOct 22
50% chanceOct 25
60% chanceOct 28
70% chanceNov 1
80% chanceNov 4
90% chanceNov 9
Probability of moderate freeze (28°F) on or before...
10% chanceOct 21
20% chanceOct 28
30% chanceNov 1
40% chanceNov 4
50% chanceNov 7
60% chanceNov 11
70% chanceNov 14
80% chanceNov 18
90% chanceNov 23
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 5
20% chanceNov 11
30% chanceNov 15
40% chanceNov 19
50% chanceNov 22
60% chanceNov 25
70% chanceNov 29
80% chanceDec 3
90% chanceDec 8
Probability of hard freeze (20°F) on or before...
10% chanceNov 19
20% chanceNov 25
30% chanceNov 30
40% chanceDec 2
50% chanceDec 6
60% chanceDec 9
70% chanceDec 13
80% chanceDec 18
90% chanceDec 25
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 2
20% chanceDec 7
30% chanceDec 11
40% chanceDec 16
50% chanceDec 20
60% chanceDec 24
70% chanceDec 29
80% chanceJan 2
90% chanceJan 10

Agricultural climatic data from weather station: DOYLESTOWN AP (USW00054786)

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