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🍂 First Frost Dates for Coatesville, Pennsylvania 19320

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 13. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Coatesville, 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 27
20% chanceOct 1
30% chanceOct 3
40% chanceOct 5
50% chanceOct 8
60% chanceOct 10
70% chanceOct 13
80% chanceOct 17
90% chanceOct 22
Probability of light freeze (32°F) on or before...
10% chanceOct 5
20% chanceOct 10
30% chanceOct 13
40% chanceOct 16
50% chanceOct 19
60% chanceOct 22
70% chanceOct 26
80% chanceOct 30
90% chanceNov 4
Probability of moderate freeze (28°F) on or before...
10% chanceOct 16
20% chanceOct 22
30% chanceOct 26
40% chanceOct 29
50% chanceNov 1
60% chanceNov 4
70% chanceNov 7
80% chanceNov 11
90% chanceNov 17
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 29
20% chanceNov 3
30% chanceNov 7
40% chanceNov 11
50% chanceNov 14
60% chanceNov 18
70% chanceNov 22
80% chanceNov 27
90% chanceDec 2
Probability of hard freeze (20°F) on or before...
10% chanceNov 11
20% chanceNov 17
30% chanceNov 21
40% chanceNov 25
50% chanceNov 29
60% chanceDec 1
70% chanceDec 5
80% chanceDec 10
90% chanceDec 16
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 25
20% chanceDec 1
30% chanceDec 4
40% chanceDec 8
50% chanceDec 12
60% chanceDec 15
70% chanceDec 19
80% chanceDec 24
90% chanceDec 29

Agricultural climatic data from weather station: COATESVILLE 2 W (USC00361591)

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