Maryville, TN 37803 Frost Dates
Frost dates for Maryville, TN, ZIP 37803
The last spring frost here typically falls around 04/01, about 216 days from today. The first fall frost typically arrives around 11/02, about 215 frost-free days later.
Maryville 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 Maryville has about 9 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.
How much risk comes with planting early here
04/01 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. 04/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Maryville compares
Maryville's growing season runs about 215 days, ranking 14,027 of 40,283 US ZIP codes measured here, longest to shortest. Within TN, it ranks 228 of 770.
Learn more
local microclimates explains what one yard in Maryville can differ from the 37803 normal, and zone vs. frost date explains why Zone 7b and Maryville's frost date answer different questions.