Barnesville, MD 20842 Frost Dates
Frost dates for Barnesville, MD, ZIP 20842
The last spring frost here typically falls around 04/14, about 229 days from today. The first fall frost typically arrives around 10/29, about 196 frost-free days later.
The USDA Plant Hardiness Zone Map puts Barnesville in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 7b around Barnesville 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
04/14 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. 05/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Barnesville compares
At roughly 196 frost-free days, Barnesville places 19,109 of 40,283 ZIP codes in this dataset. Within MD, it ranks 497 of 583.
Learn more
local microclimates explains what one yard in Barnesville can differ from the 20842 normal, and zone vs. frost date explains why Zone 7b and Barnesville's frost date answer different questions.