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🍂 First Frost Dates for Gladwyne, Pennsylvania 19035

The first 36°F frost date is 30% likely to be on Oct 9. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 21. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Gladwyne, 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 3
20% chanceOct 6
30% chanceOct 9
40% chanceOct 13
50% chanceOct 16
60% chanceOct 18
70% chanceOct 22
80% chanceOct 26
90% chanceNov 1
Probability of light freeze (32°F) on or before...
10% chanceOct 12
20% chanceOct 17
30% chanceOct 21
40% chanceOct 25
50% chanceOct 28
60% chanceOct 31
70% chanceNov 2
80% chanceNov 6
90% chanceNov 10
Probability of moderate freeze (28°F) on or before...
10% chanceOct 24
20% chanceOct 30
30% chanceNov 2
40% chanceNov 5
50% chanceNov 8
60% chanceNov 11
70% chanceNov 15
80% chanceNov 19
90% chanceNov 24
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 6
20% chanceNov 11
30% chanceNov 15
40% chanceNov 19
50% chanceNov 22
60% chanceNov 25
70% chanceNov 29
80% chanceDec 3
90% chanceDec 9
Probability of hard freeze (20°F) on or before...
10% chanceNov 18
20% chanceNov 24
30% chanceNov 28
40% chanceDec 1
50% chanceDec 5
60% chanceDec 9
70% chanceDec 14
80% chanceDec 20
90% chanceDec 26
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 1
20% chanceDec 6
30% chanceDec 11
40% chanceDec 16
50% chanceDec 21
60% chanceDec 25
70% chanceDec 30
80% chanceJan 4
90% chanceJan 12

Agricultural climatic data from weather station: NORRISTOWN (USC00366370)

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