Oak Hill, TN 37220 Frost Dates
Oak Hill, TN: when does the frost end?
Typically, the last spring freeze lands around 04/15, roughly 230 days out. Fall's first freeze usually shows up around 10/26, roughly 193 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Oak Hill in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 8 weeks until Oak Hill's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/04 and only about 1 year in 10 sees frost after that.
Oak Hill against the rest of the dataset
About 193 days separate Oak Hill's last and first frost, putting it 19,886 of 40,283 ZIP codes nationally. Within TN, it ranks 591 of 770.
Learn more
Before leaning on 37220's figures: the frost range explains how to read the range around Oak Hill's dates instead of trusting one, while local microclimates explains what one yard in Oak Hill can differ from the 37220 normal.