Jonesborough, TN 37690 Frost Dates
Frost dates for Jonesborough, TN, ZIP 37690
Around 04/16 is the usual last spring frost, about 231 days away. The first fall frost typically arrives around 10/24, about 190 frost-free days later.
Zone 7b (5 to 10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Jonesborough, not a forecast for this year.
What to do before the first frost
Zone 7b around Jonesborough has about 8 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.
Why 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 03/30 and you're betting against frost in roughly 9 years out of 10. 05/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Jonesborough compares
About 190 days separate Jonesborough's last and first frost, putting it 21,134 of 40,283 ZIP codes nationally. Within TN, it ranks 658 of 770.
Learn more
the frost range explains how to read the range around Jonesborough's dates instead of trusting one, and local microclimates explains what one yard in Jonesborough can differ from the 37690 normal.