🌷 Your Ultimate Garden Calendar!

🌷 Last Frost Dates for Knoxville, Pennsylvania 16928

The last 36°F Spring frost date is 30% likely to be on Jun 2. (See detailed probabilities below.)

The last 32°F light freeze date is 30% likely to be on May 22. (See detailed probabilities below.)

(See also 🍂 First Fall Frost Dates.)

Last frost date probabilities for Knoxville, 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 Last Frost Date?

The last spring frost signals when your area is safe from freezing temperatures. Tender plants can now grow outdoors without cold damage! This marks the beginning of the growing season. Last spring frost serves as your essential starting point for planting warm-season crops. It's also time to remove winter protection from your perennials. Enjoy the longer days and warmer weather!

How to use the Last Frost Date?

Start seeds indoors several weeks before your last frost date. This gives plants time to reach transplanting size when weather permits. Plan your outdoor planting schedule around your area's average last frost date. Plant some crops before and some after this date to protect against weather changes. Look for spots in your yard where frost stays longer or disappears earlier. Create your own frost map to use all available growing space and extend your season. Keep watching your local weather forecast to catch any surprise late frosts.

Last Frost Date Probabilities

Probability of frost (36°F) on or after…
10% chanceJun 12
20% chanceJun 5
30% chanceJun 2
40% chanceMay 31
50% chanceMay 28
60% chanceMay 25
70% chanceMay 21
80% chanceMay 17
90% chanceMay 12
Probability of light freeze (32°F) on or after…
10% chanceMay 31
20% chanceMay 27
30% chanceMay 22
40% chanceMay 18
50% chanceMay 15
60% chanceMay 11
70% chanceMay 7
80% chanceMay 3
90% chanceApr 28
Probability of moderate freeze (28°F) on or after…
10% chanceMay 18
20% chanceMay 11
30% chanceMay 6
40% chanceMay 3
50% chanceApr 30
60% chanceApr 28
70% chanceApr 25
80% chanceApr 22
90% chanceApr 17
Probability of moderate hard freeze (24°F) on or after…
10% chanceApr 30
20% chanceApr 25
30% chanceApr 21
40% chanceApr 19
50% chanceApr 16
60% chanceApr 13
70% chanceApr 10
80% chanceApr 6
90% chanceApr 2
Probability of hard freeze (20°F) on or after…
10% chanceApr 17
20% chanceApr 12
30% chanceApr 9
40% chanceApr 6
50% chanceApr 3
60% chanceApr 1
70% chanceMar 31
80% chanceMar 27
90% chanceMar 21
Probability of severe hard freeze (16°F) on or after…
10% chanceApr 7
20% chanceApr 3
30% chanceMar 31
40% chanceMar 30
50% chanceMar 27
60% chanceMar 23
70% chanceMar 20
80% chanceMar 17
90% chanceMar 12

Agricultural climatic data from weather station: ADDISON (USC00300023)

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