Leonardtown, MD 20653 Frost Dates
Frost dates for Leonardtown, MD, ZIP 20653
Around 03/29 is the usual last spring frost, about 213 days away. The first fall frost typically arrives around 11/15, about 230 frost-free days later.
The USDA Plant Hardiness Zone Map puts Leonardtown in Zone 8a (10 to 15°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 8a around Leonardtown has about 11 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 03/29 isn't a guarantee
03/29 is the middle of 30 years of NOAA records, not a promise. Plant by 03/15 and you're betting against frost in roughly 9 years out of 10. 04/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Leonardtown compares
About 230 days separate Leonardtown's last and first frost, putting it 10,401 of 40,283 ZIP codes nationally. Within MD, it ranks 78 of 583.
Learn more
zone vs. frost date explains why Zone 8a and Leonardtown's frost date answer different questions, and the frost range explains how to read the range around Leonardtown's dates instead of trusting one.