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🌷 Last Frost Dates for Gwynn Oak, Maryland 21207

The last 36°F Spring frost date is 30% likely to be on Apr 4. (See detailed probabilities below.)

The last 32°F light freeze date is 30% likely to be on Mar 27. (See detailed probabilities below.)

(See also 🍂 First Fall Frost Dates.)

Last frost date probabilities for Gwynn Oak, MD 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% chanceApr 12
20% chanceApr 7
30% chanceApr 4
40% chanceApr 2
50% chanceMar 31
60% chanceMar 28
70% chanceMar 24
80% chanceMar 21
90% chanceMar 17
Probability of light freeze (32°F) on or after…
10% chanceApr 4
20% chanceMar 31
30% chanceMar 27
40% chanceMar 23
50% chanceMar 20
60% chanceMar 17
70% chanceMar 14
80% chanceMar 11
90% chanceMar 8
Probability of moderate freeze (28°F) on or after…
10% chanceMar 28
20% chanceMar 22
30% chanceMar 17
40% chanceMar 14
50% chanceMar 11
60% chanceMar 8
70% chanceMar 5
80% chanceMar 1
90% chanceFeb 24
Probability of moderate hard freeze (24°F) on or after…
10% chanceMar 17
20% chanceMar 10
30% chanceMar 6
40% chanceMar 2
50% chanceFeb 27
60% chanceFeb 22
70% chanceFeb 17
80% chanceFeb 10
90% chanceFeb 2
Probability of hard freeze (20°F) on or after…
10% chanceMar 5
20% chanceFeb 27
30% chanceFeb 20
40% chanceFeb 13
50% chanceFeb 6
60% chanceFeb 2
70% chanceJan 30
80% chanceJan 22
90% chanceJan 11
Probability of severe hard freeze (16°F) on or after…
10% chanceFeb 20
20% chanceFeb 8
30% chanceFeb 2
40% chanceJan 31
50% chanceJan 27
60% chanceJan 22
70% chanceJan 16
80% chanceJan 11
90% chanceJan 1

Agricultural climatic data from weather station: BALTIMORE CUSTOMS HOUSE (USW00013777)

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