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🍂 First Frost Dates for Wellsville, Pennsylvania 17365

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

The first 32°F light freeze date is 30% likely to be on Oct 9. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Wellsville, 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 22
20% chanceSep 27
30% chanceSep 30
40% chanceOct 2
50% chanceOct 4
60% chanceOct 6
70% chanceOct 9
80% chanceOct 12
90% chanceOct 17
Probability of light freeze (32°F) on or before...
10% chanceOct 2
20% chanceOct 6
30% chanceOct 9
40% chanceOct 12
50% chanceOct 15
60% chanceOct 18
70% chanceOct 21
80% chanceOct 25
90% chanceNov 1
Probability of moderate freeze (28°F) on or before...
10% chanceOct 12
20% chanceOct 17
30% chanceOct 21
40% chanceOct 25
50% chanceOct 28
60% chanceNov 1
70% chanceNov 3
80% chanceNov 7
90% chanceNov 12
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 25
20% chanceOct 31
30% chanceNov 3
40% chanceNov 7
50% chanceNov 11
60% chanceNov 14
70% chanceNov 18
80% chanceNov 22
90% chanceNov 29
Probability of hard freeze (20°F) on or before...
10% chanceNov 9
20% chanceNov 15
30% chanceNov 20
40% chanceNov 23
50% chanceNov 27
60% chanceDec 1
70% chanceDec 3
80% chanceDec 7
90% chanceDec 14
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 23
20% chanceDec 1
30% chanceDec 3
40% chanceDec 6
50% chanceDec 9
60% chanceDec 13
70% chanceDec 17
80% chanceDec 21
90% chanceDec 27

Agricultural climatic data from weather station: YORK AP (USW00093778)

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