Sunbright, TN 37726 Frost Dates
Sunbright, TN: when does the frost end?
The last spring frost here typically falls around 04/21, about 236 days from today. Fall's first freeze usually shows up around 10/17, roughly 177 days after the last spring frost.
Sunbright sits in USDA Zone 7a (0 to 5°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
With roughly 7 weeks until Sunbright's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/21 isn't a guarantee
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Sunbright against the rest of the dataset
At roughly 177 frost-free days, Sunbright places 26,220 of 40,283 ZIP codes in this dataset. Within TN, it ranks 750 of 770.
Learn more
Before leaning on 37726's figures: local microclimates explains what one yard in Sunbright can differ from the 37726 normal, while zone vs. frost date explains why Zone 7a and Sunbright's frost date answer different questions.