🍂 2026 First Frost Dates for Chattanooga, Tennessee 37421
The first 36°F frost date is 30% likely to be on Oct 26. (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 Chattanooga, TN are based on historical climate data.
Always check your local forecast for the most up-to-date frost warnings.
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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% chance | Oct 19 |
| 20% chance | Oct 23 |
| 30% chance | Oct 26 |
| 40% chance | Oct 28 |
| 50% chance | Oct 31 |
| 60% chance | Nov 1 |
| 70% chance | Nov 4 |
| 80% chance | Nov 7 |
| 90% chance | Nov 11 |
| Probability of light freeze (32°F) on or before... | |
|---|---|
| 10% chance | Oct 27 |
| 20% chance | Nov 1 |
| 30% chance | Nov 3 |
| 40% chance | Nov 6 |
| 50% chance | Nov 9 |
| 60% chance | Nov 11 |
| 70% chance | Nov 14 |
| 80% chance | Nov 18 |
| 90% chance | Nov 26 |
| Probability of moderate freeze (28°F) on or before... | |
|---|---|
| 10% chance | Nov 6 |
| 20% chance | Nov 10 |
| 30% chance | Nov 14 |
| 40% chance | Nov 18 |
| 50% chance | Nov 22 |
| 60% chance | Nov 26 |
| 70% chance | Dec 1 |
| 80% chance | Dec 5 |
| 90% chance | Dec 13 |
| Probability of moderate hard freeze (24°F) on or before... | |
|---|---|
| 10% chance | Nov 16 |
| 20% chance | Nov 23 |
| 30% chance | Nov 30 |
| 40% chance | Dec 4 |
| 50% chance | Dec 8 |
| 60% chance | Dec 14 |
| 70% chance | Dec 21 |
| 80% chance | Dec 28 |
| 90% chance | Jan 5 |
| Probability of hard freeze (20°F) on or before... | |
|---|---|
| 10% chance | Dec 4 |
| 20% chance | Dec 12 |
| 30% chance | Dec 21 |
| 40% chance | Dec 27 |
| 50% chance | Dec 31 |
| 60% chance | Jan 3 |
| 70% chance | Jan 8 |
| 80% chance | Jan 14 |
| 90% chance | Jan 25 |
| Probability of severe hard freeze (16°F) on or before... | |
|---|---|
| 10% chance | Dec 21 |
| 20% chance | Dec 29 |
| 30% chance | Jan 2 |
| 40% chance | Jan 5 |
| 50% chance | Jan 9 |
| 60% chance | Jan 13 |
| 70% chance | Jan 17 |
| 80% chance | Jan 24 |
| 90% chance | Jan 31 |
Agricultural climatic data from weather station: CHATTANOOGA LOVELL AP (USW00013882:frost)