Brookeville, MD 20830 Frost Dates
Frost dates for Brookeville, MD, ZIP 20830
Around 04/01 is the usual last spring frost, about 216 days away. The first fall frost typically arrives around 11/06, about 219 frost-free days later.
Brookeville 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 Brookeville 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.
Why 04/01 isn't a guarantee
04/01 is the middle of 30 years of NOAA records, not a promise. Plant by 03/19 and you're betting against frost in roughly 9 years out of 10. 04/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Brookeville compares
About 219 days separate Brookeville's last and first frost, putting it 13,113 of 40,283 ZIP codes nationally. Within MD, it ranks 236 of 583.
Learn more
local microclimates explains what one yard in Brookeville can differ from the 20830 normal, and zone vs. frost date explains why Zone 7b and Brookeville's frost date answer different questions.