Somerville, TN 38068 Frost Dates
38068, near Somerville, TN: the frost window
The last spring frost here typically falls around 04/01, about 216 days from today. Fall's first freeze usually shows up around 11/03, roughly 217 days after the last spring frost.
Somerville sits in USDA Zone 8a (10 to 15°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
Somerville's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/17 and only about 1 year in 10 sees frost after that.
Somerville against the rest of the dataset
Somerville's growing season runs about 217 days, ranking 13,481 of 40,283 US ZIP codes measured here, longest to shortest. Within TN, it ranks 180 of 770.
Learn more
Two guides worth reading on 38068: local microclimates, on what one yard in Somerville can differ from the 38068 normal, and zone vs. frost date, on why Zone 8a and Somerville's frost date answer different questions.