Mountain City, TN 37683 Frost Dates
When can you plant in Mountain City, TN?
Around 04/27 is the usual last spring frost, about 242 days away. The first fall frost typically arrives around 10/14, about 170 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mountain City in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 7 weeks of growing season left in Mountain City before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Mountain City's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mountain City compares
At roughly 170 frost-free days, Mountain City places 29,038 of 40,283 ZIP codes in this dataset. Within TN, it ranks 765 of 770.
Learn more
zone vs. frost date covers why Zone 7a and Mountain City's frost date answer different questions. the frost range covers how to read the range around Mountain City's dates instead of trusting one.