Norlina, NC 27570 Frost Dates
27570, near Norlina, NC: the frost window
Typically, the last spring freeze lands around 03/28, roughly 212 days out. Fall's first freeze usually shows up around 11/09, roughly 227 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 Norlina, not a forecast for this year.
Stretching the season past the first frost
Norlina'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.
Why 03/28 isn't a guarantee
03/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/11 and only about 1 year in 10 sees frost after that.
Norlina against the rest of the dataset
At roughly 227 frost-free days, Norlina places 11,044 of 40,283 ZIP codes in this dataset. Within NC, it ranks 349 of 1,078.
Learn more
Two guides worth reading on 27570: local microclimates, on what one yard in Norlina can differ from the 27570 normal, and zone vs. frost date, on why Zone 7b and Norlina's frost date answer different questions.