🌷 Your Ultimate Garden Calendar!

🍂 First Frost Dates for New Windsor, Maryland 21776

The first 36°F frost date is 30% likely to be on Sep 29. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 7. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for New Windsor, MD 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 25
30% chanceSep 29
40% chanceOct 1
50% chanceOct 3
60% chanceOct 5
70% chanceOct 8
80% chanceOct 12
90% chanceOct 16
Probability of light freeze (32°F) on or before...
10% chanceOct 1
20% chanceOct 4
30% chanceOct 7
40% chanceOct 10
50% chanceOct 14
60% chanceOct 16
70% chanceOct 20
80% chanceOct 23
90% chanceOct 30
Probability of moderate freeze (28°F) on or before...
10% chanceOct 10
20% chanceOct 15
30% chanceOct 19
40% chanceOct 23
50% chanceOct 26
60% chanceOct 30
70% chanceNov 1
80% chanceNov 5
90% chanceNov 10
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 23
20% chanceOct 29
30% chanceNov 1
40% chanceNov 4
50% chanceNov 7
60% chanceNov 11
70% chanceNov 14
80% chanceNov 19
90% chanceNov 25
Probability of hard freeze (20°F) on or before...
10% chanceNov 5
20% chanceNov 10
30% chanceNov 15
40% chanceNov 18
50% chanceNov 22
60% chanceNov 26
70% chanceNov 30
80% chanceDec 4
90% chanceDec 11
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 17
20% chanceNov 23
30% chanceNov 29
40% chanceDec 2
50% chanceDec 6
60% chanceDec 10
70% chanceDec 15
80% chanceDec 20
90% chanceDec 26

Agricultural climatic data from weather station: UNIONVILLE (USC00189030)

Back to Weather Calendar