Loudon, TN 37774 Frost Dates
Loudon, TN: when does the frost end?
Typically, the last spring freeze lands around 04/05, roughly 220 days out. Fall's first freeze usually shows up around 11/01, roughly 210 days after the last spring frost.
Zone 7b (5 to 10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Loudon, not a forecast for this year.
Stretching the season past the first frost
With roughly 9 weeks until Loudon'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
04/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/21 and only about 1 year in 10 sees frost after that.
Loudon against the rest of the dataset
About 210 days separate Loudon's last and first frost, putting it 15,000 of 40,283 ZIP codes nationally. Within TN, it ranks 329 of 770.
Learn more
Before leaning on 37774's figures: local microclimates explains what one yard in Loudon can differ from the 37774 normal, while zone vs. frost date explains why Zone 7b and Loudon's frost date answer different questions.