Chattanooga, TN 37416 Frost Dates
Frost dates for Chattanooga, TN, ZIP 37416
The last spring frost here typically falls around 03/24, about 208 days from today. The first fall frost typically arrives around 11/09, about 230 frost-free days later.
Chattanooga sits in USDA Zone 8a (10 to 15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 8a around Chattanooga has about 10 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
03/24 is the middle of 30 years of NOAA records, not a promise. Plant by 03/06 and you're betting against frost in roughly 9 years out of 10. 04/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Chattanooga compares
At roughly 230 frost-free days, Chattanooga places 10,295 of 40,283 ZIP codes in this dataset. Within TN, it ranks 54 of 770.
Learn more
local microclimates explains what one yard in Chattanooga can differ from the 37416 normal, and zone vs. frost date explains why Zone 8a and Chattanooga's frost date answer different questions.