Altamont, TN 37301 Frost Dates
When can you plant in Altamont, TN?
Typically, the last spring freeze lands around 04/07, roughly 222 days out. The first fall frost typically arrives around 10/30, about 203 frost-free days later.
The USDA Plant Hardiness Zone Map puts Altamont in Zone 7b (5 to 10°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 9 weeks of growing season left in Altamont before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/07 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. 04/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Altamont compares
Altamont's growing season runs about 203 days, ranking 16,983 of 40,283 US ZIP codes measured here, longest to shortest. Within TN, it ranks 510 of 770.
Learn more
local microclimates covers what one yard in Altamont can differ from the 37301 normal. zone vs. frost date covers why Zone 7b and Altamont's frost date answer different questions.