Morristown, TN 37814 Frost Dates
Morristown, TN: when does the frost end?
Typically, the last spring freeze lands around 03/31, roughly 215 days out. Fall's first freeze usually shows up around 11/04, roughly 217 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 Morristown, not a forecast for this year.
Stretching the season past the first frost
With roughly 10 weeks until Morristown's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Morristown's last frost
03/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/18 and only about 1 year in 10 sees frost after that.
Morristown against the rest of the dataset
Morristown's growing season runs about 217 days, ranking 13,413 of 40,283 US ZIP codes measured here, longest to shortest. Within TN, it ranks 175 of 770.
Learn more
Before leaning on 37814's figures: local microclimates explains what one yard in Morristown can differ from the 37814 normal, while zone vs. frost date explains why Zone 7b and Morristown's frost date answer different questions.