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🍂 First Frost Dates for Ulysses, Pennsylvania 16948

The first 36°F frost date is 30% likely to be on Sep 20. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 1. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Ulysses, 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 7
20% chanceSep 15
30% chanceSep 20
40% chanceSep 23
50% chanceSep 26
60% chanceSep 28
70% chanceSep 30
80% chanceOct 3
90% chanceOct 7
Probability of light freeze (32°F) on or before...
10% chanceSep 25
20% chanceSep 29
30% chanceOct 1
40% chanceOct 4
50% chanceOct 6
60% chanceOct 8
70% chanceOct 12
80% chanceOct 15
90% chanceOct 22
Probability of moderate freeze (28°F) on or before...
10% chanceOct 3
20% chanceOct 7
30% chanceOct 10
40% chanceOct 14
50% chanceOct 17
60% chanceOct 21
70% chanceOct 26
80% chanceOct 31
90% chanceNov 6
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 11
20% chanceOct 18
30% chanceOct 22
40% chanceOct 27
50% chanceOct 31
60% chanceNov 4
70% chanceNov 8
80% chanceNov 13
90% chanceNov 18
Probability of hard freeze (20°F) on or before...
10% chanceOct 26
20% chanceNov 2
30% chanceNov 7
40% chanceNov 12
50% chanceNov 16
60% chanceNov 19
70% chanceNov 23
80% chanceNov 28
90% chanceDec 4
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 13
20% chanceNov 18
30% chanceNov 22
40% chanceNov 26
50% chanceNov 30
60% chanceDec 2
70% chanceDec 6
80% chanceDec 10
90% chanceDec 15

Agricultural climatic data from weather station: WELLSVILLE MUNI AP (USW00054757)

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