Leonardtown, MD 20688 Frost Dates
Frost dates for Leonardtown, MD, ZIP 20688
Around 03/22 is the usual last spring frost, about 206 days away. The first fall frost typically arrives around 11/26, about 248 frost-free days later.
Leonardtown sits in USDA Zone 8a (10 to 15°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 8a around Leonardtown has about 13 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.
The actual range around Leonardtown's last frost
03/22 is the middle of 30 years of NOAA records, not a promise. Plant by 03/06 and you're betting against frost in roughly 9 years out of 10. 04/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Leonardtown compares
About 248 days separate Leonardtown's last and first frost, putting it 7,707 of 40,283 ZIP codes nationally. Within MD, it ranks 14 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.