🌷 Your Ultimate Garden Calendar!

🍂 First Frost Dates for McConnell, Illinois 61050

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 4. (See detailed probabilities below.)

(See also 🌷 Last Spring Frost Dates.)

First frost date probabilities for McConnell, IL 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 28
50% chanceSep 30
60% chanceOct 2
70% chanceOct 5
80% chanceOct 7
90% chanceOct 12
Probability of light freeze (32°F) on or before...
10% chanceSep 27
20% chanceOct 1
30% chanceOct 4
40% chanceOct 6
50% chanceOct 9
60% chanceOct 12
70% chanceOct 15
80% chanceOct 18
90% chanceOct 23
Probability of moderate freeze (28°F) on or before...
10% chanceOct 5
20% chanceOct 10
30% chanceOct 14
40% chanceOct 18
50% chanceOct 21
60% chanceOct 24
70% chanceOct 27
80% chanceOct 30
90% chanceNov 3
Probability of moderate hard freeze (24°F) on or before...
10% chanceOct 16
20% chanceOct 22
30% chanceOct 26
40% chanceOct 30
50% chanceNov 1
60% chanceNov 4
70% chanceNov 7
80% chanceNov 12
90% chanceNov 18
Probability of hard freeze (20°F) on or before...
10% chanceOct 30
20% chanceNov 2
30% chanceNov 6
40% chanceNov 10
50% chanceNov 14
60% chanceNov 17
70% chanceNov 21
80% chanceNov 25
90% chanceNov 29
Probability of severe hard freeze (16°F) on or before...
10% chanceNov 7
20% chanceNov 13
30% chanceNov 17
40% chanceNov 21
50% chanceNov 24
60% chanceNov 27
70% chanceNov 30
80% chanceDec 3
90% chanceDec 9

Agricultural climatic data from weather station: FREEPORT WASTE WTP (USC00113262)

Back to Weather Calendar