East Ridge, TN 37421 Frost Dates
Frost dates for East Ridge, TN, ZIP 37421
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.
East Ridge 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 East Ridge 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.
The actual range around East Ridge's last frost
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 East Ridge compares
At roughly 230 frost-free days, East Ridge places 10,330 of 40,283 ZIP codes in this dataset. Within TN, it ranks 63 of 770.
Learn more
zone vs. frost date explains why Zone 8a and East Ridge's frost date answer different questions, and the frost range explains how to read the range around East Ridge's dates instead of trusting one.