Morristown, TN 37813 Frost Dates
Frost dates for Morristown, TN, ZIP 37813
Around 03/31 is the usual last spring frost, about 215 days away. The first fall frost typically arrives around 11/04, about 217 frost-free days later.
Morristown 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.
What to do before the first frost
Zone 7b around Morristown has about 10 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Morristown's last frost
03/31 is the middle of 30 years of NOAA records, not a promise. Plant by 03/14 and you're betting against frost in roughly 9 years out of 10. 04/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Morristown compares
Morristown's growing season runs about 217 days, ranking 13,412 of 40,283 US ZIP codes measured here, longest to shortest. Within TN, it ranks 174 of 770.
Learn more
zone vs. frost date explains why Zone 7b and Morristown's frost date answer different questions, and the frost range explains how to read the range around Morristown's dates instead of trusting one.