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🌷 Last Frost Dates for Chelsea, Massachusetts 02150

The last 36°F Spring frost date is 30% likely to be on Apr 22. (See detailed probabilities below.)

The last 32°F light freeze date is 30% likely to be on Apr 10. (See detailed probabilities below.)

(See also 🍂 First Fall Frost Dates.)

Last frost date probabilities for Chelsea, MA 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 30
20% chanceApr 25
30% chanceApr 22
40% chanceApr 20
50% chanceApr 18
60% chanceApr 15
70% chanceApr 13
80% chanceApr 10
90% chanceApr 6
Probability of light freeze (32°F) on or after…
10% chanceApr 18
20% chanceApr 14
30% chanceApr 10
40% chanceApr 8
50% chanceApr 6
60% chanceApr 4
70% chanceApr 2
80% chanceMar 31
90% chanceMar 26
Probability of moderate freeze (28°F) on or after…
10% chanceApr 8
20% chanceApr 4
30% chanceApr 2
40% chanceMar 31
50% chanceMar 29
60% chanceMar 25
70% chanceMar 22
80% chanceMar 19
90% chanceMar 15
Probability of moderate hard freeze (24°F) on or after…
10% chanceApr 2
20% chanceMar 30
30% chanceMar 26
40% chanceMar 22
50% chanceMar 20
60% chanceMar 17
70% chanceMar 14
80% chanceMar 11
90% chanceMar 7
Probability of hard freeze (20°F) on or after…
10% chanceMar 29
20% chanceMar 23
30% chanceMar 19
40% chanceMar 16
50% chanceMar 13
60% chanceMar 10
70% chanceMar 7
80% chanceMar 4
90% chanceFeb 27
Probability of severe hard freeze (16°F) on or after…
10% chanceMar 21
20% chanceMar 15
30% chanceMar 11
40% chanceMar 7
50% chanceMar 4
60% chanceMar 1
70% chanceFeb 25
80% chanceFeb 20
90% chanceFeb 12

Agricultural climatic data from weather station: BOSTON LOGAN INTL AP (USW00014739)

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