Petersburg, VA 23805 Frost Dates
Frost dates for Petersburg, VA, ZIP 23805
The last spring frost here typically falls around 04/03, about 218 days from today. The first fall frost typically arrives around 11/03, about 216 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 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.
How much risk comes with planting early here
04/03 is the middle of 30 years of NOAA records, not a promise. Plant by 03/20 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 Petersburg compares
At roughly 216 frost-free days, Petersburg places 13,728 of 40,283 ZIP codes in this dataset. Within VA, it ranks 307 of 1,178.
Learn more
local microclimates explains what one yard in Petersburg can differ from the 23805 normal, and zone vs. frost date explains why Zone 7b and Petersburg's frost date answer different questions.