🌷 Your Ultimate Garden Calendar!

🍂 First Frost Dates for Maryland Heights, Missouri 63043

The first 36°F frost date is 30% likely to be on Oct 9. (See detailed probabilities below.)

The first 32°F light freeze date is 30% likely to be on Oct 20. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for Maryland Heights, MO 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 1
20% chanceOct 5
30% chanceOct 9
40% chanceOct 12
50% chanceOct 15
60% chanceOct 18
70% chanceOct 21
80% chanceOct 24
90% chanceOct 29
Probability of light freeze (32°F) on or before...
10% chanceOct 10
20% chanceOct 16
30% chanceOct 20
40% chanceOct 24
50% chanceOct 27
60% chanceOct 30
70% chanceNov 1
80% chanceNov 5
90% chanceNov 11
Probability of moderate freeze (28°F) on or before...
10% chanceOct 22
20% chanceOct 28
30% chanceNov 1
40% chanceNov 4
50% chanceNov 7
60% chanceNov 11
70% chanceNov 15
80% chanceNov 19
90% chanceNov 26
Probability of moderate hard freeze (24°F) on or before...
10% chanceNov 4
20% chanceNov 9
30% chanceNov 14
40% chanceNov 17
50% chanceNov 21
60% chanceNov 25
70% chanceNov 29
80% chanceDec 2
90% chanceDec 8
Probability of hard freeze (20°F) on or before...
10% chanceNov 13
20% chanceNov 21
30% chanceNov 25
40% chanceNov 29
50% chanceDec 2
60% chanceDec 5
70% chanceDec 9
80% chanceDec 13
90% chanceDec 19
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 25
20% chanceDec 1
30% chanceDec 4
40% chanceDec 7
50% chanceDec 10
60% chanceDec 14
70% chanceDec 18
80% chanceDec 22
90% chanceDec 28

Agricultural climatic data from weather station: ST CHARLES 7 SSW (USC00237398)

Back to Weather Calendar