Erwin, TN 37650 Frost Dates
Frost dates for Erwin, TN, ZIP 37650
Typically, the last spring freeze lands around 04/24, roughly 239 days out. The first fall frost typically arrives around 10/19, about 180 frost-free days later.
Erwin sits in USDA Zone 7a (0 to 5°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 7a around Erwin has about 7 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 Erwin's last frost
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/05 and you're betting against frost in roughly 9 years out of 10. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Erwin compares
At roughly 180 frost-free days, Erwin places 24,849 of 40,283 ZIP codes in this dataset. Within TN, it ranks 737 of 770.
Learn more
zone vs. frost date explains why Zone 7a and Erwin's frost date answer different questions, and the frost range explains how to read the range around Erwin's dates instead of trusting one.