Petersburg, TN 37144 Frost Dates
Frost dates for Petersburg, TN, ZIP 37144
Around 04/14 is the usual last spring frost, about 229 days away. The first fall frost typically arrives around 10/22, about 192 frost-free days later.
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 Petersburg, not a forecast for this year.
What to do before the first frost
Zone 7b around Petersburg has about 8 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
04/14 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Petersburg compares
Petersburg's growing season runs about 192 days, ranking 20,515 of 40,283 US ZIP codes measured here, longest to shortest. Within TN, it ranks 645 of 770.
Learn more
the frost range explains how to read the range around Petersburg's dates instead of trusting one, and local microclimates explains what one yard in Petersburg can differ from the 37144 normal.