🌷 Your Ultimate Garden Calendar!

🍂 First Frost Dates for Devens, Massachusetts 01434

The first 36°F frost date is 30% likely to be on Sep 26. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 5. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Devens, 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% chanceSep 19
20% chanceSep 23
30% chanceSep 26
40% chanceSep 29
50% chanceOct 1
60% chanceOct 3
70% chanceOct 5
80% chanceOct 8
90% chanceOct 12
Probability of light freeze (32°F) on or before...
10% chanceSep 29
20% chanceOct 2
30% chanceOct 5
40% chanceOct 8
50% chanceOct 10
60% chanceOct 13
70% chanceOct 16
80% chanceOct 20
90% chanceOct 25
Probability of moderate freeze (28°F) on or before...
10% chanceOct 8
20% chanceOct 13
30% chanceOct 16
40% chanceOct 20
50% chanceOct 23
60% chanceOct 26
70% chanceOct 30
80% chanceNov 2
90% chanceNov 6
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 21
20% chanceOct 26
30% chanceOct 30
40% chanceNov 2
50% chanceNov 5
60% chanceNov 8
70% chanceNov 11
80% chanceNov 15
90% chanceNov 21
Probability of hard freeze (20°F) on or before...
10% chanceNov 3
20% chanceNov 8
30% chanceNov 12
40% chanceNov 15
50% chanceNov 19
60% chanceNov 22
70% chanceNov 25
80% chanceNov 29
90% chanceDec 4
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 15
20% chanceNov 21
30% chanceNov 25
40% chanceNov 28
50% chanceDec 1
60% chanceDec 4
70% chanceDec 7
80% chanceDec 11
90% chanceDec 16

Agricultural climatic data from weather station: FITCHBURG MUNI AP (USW00004780)

Back to Weather Calendar