Norris, TN 37705 Frost Dates
37705, near Norris, TN: the frost window
Around 03/31 is the usual last spring frost, about 215 days away. Fall's first freeze usually shows up around 11/04, roughly 218 days after the last spring frost.
Norris sits in USDA Zone 7b (5 to 10°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
Norris'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
03/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/15 and only about 1 year in 10 sees frost after that.
Norris against the rest of the dataset
At roughly 218 frost-free days, Norris places 13,288 of 40,283 ZIP codes in this dataset. Within TN, it ranks 171 of 770.
Learn more
Two guides worth reading on 37705: zone vs. frost date, on why Zone 7b and Norris's frost date answer different questions, and the frost range, on how to read the range around Norris's dates instead of trusting one.