Blaine, TN 37871 Frost Dates
37871, near Blaine, TN: the frost window
Around 04/06 is the usual last spring frost, about 221 days away. Fall's first freeze usually shows up around 10/29, roughly 205 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 Blaine, not a forecast for this year.
Stretching the season past the first frost
Blaine's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/06 isn't a guarantee
04/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/23 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.
Blaine against the rest of the dataset
About 205 days separate Blaine's last and first frost, putting it 16,321 of 40,283 ZIP codes nationally. Within TN, it ranks 451 of 770.
Learn more
Two guides worth reading on 37871: zone vs. frost date, on why Zone 7b and Blaine's frost date answer different questions, and the frost range, on how to read the range around Blaine's dates instead of trusting one.