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🍂 First Frost Dates for Fairfield, Pennsylvania 17320

The first 36°F frost date is 30% likely to be on Oct 1. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 8. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Fairfield, 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 24
20% chanceSep 28
30% chanceOct 1
40% chanceOct 3
50% chanceOct 5
60% chanceOct 7
70% chanceOct 10
80% chanceOct 14
90% chanceOct 19
Probability of light freeze (32°F) on or before...
10% chanceOct 2
20% chanceOct 5
30% chanceOct 8
40% chanceOct 12
50% chanceOct 15
60% chanceOct 18
70% chanceOct 21
80% chanceOct 25
90% chanceOct 31
Probability of moderate freeze (28°F) on or before...
10% chanceOct 10
20% chanceOct 15
30% chanceOct 19
40% chanceOct 23
50% chanceOct 26
60% chanceOct 30
70% chanceNov 2
80% chanceNov 5
90% chanceNov 10
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 21
20% chanceOct 27
30% chanceNov 1
40% chanceNov 3
50% chanceNov 6
60% chanceNov 9
70% chanceNov 13
80% chanceNov 17
90% chanceNov 24
Probability of hard freeze (20°F) on or before...
10% chanceNov 2
20% chanceNov 7
30% chanceNov 12
40% chanceNov 17
50% chanceNov 20
60% chanceNov 25
70% chanceNov 29
80% chanceDec 3
90% chanceDec 10
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 17
20% chanceNov 24
30% chanceNov 30
40% chanceDec 2
50% chanceDec 6
60% chanceDec 10
70% chanceDec 15
80% chanceDec 20
90% chanceDec 26

Agricultural climatic data from weather station: EMMITSBURG 2 SE (USC00182906)

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