Clear Spring, MD 21722 Frost Dates
Frost dates for Clear Spring, MD, ZIP 21722
The last spring frost here typically falls around 04/07, about 222 days from today. The first fall frost typically arrives around 11/04, about 209 frost-free days later.
The USDA Plant Hardiness Zone Map puts Clear Spring in Zone 7a (0 to 5°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 7a around Clear Spring 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.
The actual range around Clear Spring's last frost
04/07 is the middle of 30 years of NOAA records, not a promise. Plant by 03/25 and you're betting against frost in roughly 9 years out of 10. 04/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Clear Spring compares
About 209 days separate Clear Spring's last and first frost, putting it 15,396 of 40,283 ZIP codes nationally. Within MD, it ranks 353 of 583.
Learn more
the frost range explains how to read the range around Clear Spring's dates instead of trusting one, and local microclimates explains what one yard in Clear Spring can differ from the 21722 normal.