🌷 Your Ultimate Garden Calendar!

🍂 First Frost Dates for Chelsea, Massachusetts 02150

The first 36°F frost date is 30% likely to be on Oct 21. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Nov 3. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First 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.

Book Recommendations (ads!)

📚 Growing Under Cover: Techniques for a More Productive, Weather-Resistant, Pest-Free Vegetable Garden

📚 Greenhouse Gardening for Beginners: Step By Step Guide To Build A Year-Round Greenhouse And Grow Herbs, Organic Fruits And Vegetables, Plants, Flowers Plans & Ideas for Extending the Growing Season

📚 How to Garden Indoors & Grow Your Own Food Year Round: Ultimate Guide to Vertical, Container, and Hydroponic Gardening (Creative Homeowner) Vegetables, Herbs, DIY Projects, Composting, Lights, & More

📚 The Year-Round Vegetable Gardener: How to Grow Your Own Food 365 Days a Year, No Matter Where You Live

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 13
20% chanceOct 18
30% chanceOct 21
40% chanceOct 24
50% chanceOct 27
60% chanceOct 29
70% chanceNov 1
80% chanceNov 3
90% chanceNov 7
Probability of light freeze (32°F) on or before...
10% chanceOct 27
20% chanceNov 1
30% chanceNov 3
40% chanceNov 5
50% chanceNov 8
60% chanceNov 11
70% chanceNov 14
80% chanceNov 17
90% chanceNov 21
Probability of moderate freeze (28°F) on or before...
10% chanceNov 8
20% chanceNov 13
30% chanceNov 16
40% chanceNov 19
50% chanceNov 21
60% chanceNov 24
70% chanceNov 26
80% chanceNov 29
90% chanceDec 4
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 19
20% chanceNov 23
30% chanceNov 27
40% chanceNov 30
50% chanceDec 1
60% chanceDec 4
70% chanceDec 7
80% chanceDec 11
90% chanceDec 17
Probability of hard freeze (20°F) on or before...
10% chanceNov 27
20% chanceDec 1
30% chanceDec 5
40% chanceDec 8
50% chanceDec 11
60% chanceDec 15
70% chanceDec 18
80% chanceDec 22
90% chanceDec 27
Probability of severe hard freeze (16°F) on or before...
10% chanceDec 4
20% chanceDec 9
30% chanceDec 14
40% chanceDec 18
50% chanceDec 21
60% chanceDec 25
70% chanceDec 29
80% chanceJan 2
90% chanceJan 8

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

Back to Weather Calendar