Copperhill, TN 37317 Frost Dates
37317, near Copperhill, TN: the frost window
Typically, the last spring freeze lands around 04/13, roughly 228 days out. Fall's first freeze usually shows up around 10/24, roughly 193 days after the last spring frost.
Copperhill 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.
Stretching the season past the first frost
Copperhill's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/13 isn't a guarantee
04/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/29 and only about 1 year in 10 sees frost after that.
Copperhill against the rest of the dataset
At roughly 193 frost-free days, Copperhill places 20,055 of 40,283 ZIP codes in this dataset. Within TN, it ranks 602 of 770.
Learn more
Two guides worth reading on 37317: the frost range, on how to read the range around Copperhill's dates instead of trusting one, and local microclimates, on what one yard in Copperhill can differ from the 37317 normal.