Calhoun, TN 37370 Frost Dates
Frost dates for Calhoun, TN, ZIP 37370
Around 04/06 is the usual last spring frost, about 221 days away. The first fall frost typically arrives around 10/31, about 208 frost-free days later.
Calhoun sits in USDA Zone 7b (5 to 10°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 7b around Calhoun has about 9 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
04/06 is the middle of 30 years of NOAA records, not a promise. Plant by 03/20 and you're betting against frost in roughly 9 years out of 10. 04/24 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Calhoun compares
About 208 days separate Calhoun's last and first frost, putting it 15,715 of 40,283 ZIP codes nationally. Within TN, it ranks 393 of 770.
Learn more
the frost range explains how to read the range around Calhoun's dates instead of trusting one, and local microclimates explains what one yard in Calhoun can differ from the 37370 normal.