Mount Airy, MD 21771 Frost Dates
When can you plant in Mount Airy, MD?
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.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Mount Airy, not a forecast for this year.
What to do before the first frost
About 9 weeks of growing season left in Mount Airy before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Mount Airy's last frost
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 Mount Airy compares
Mount Airy's growing season runs about 196 days, ranking 18,941 of 40,283 US ZIP codes measured here, longest to shortest. Within MD, it ranks 484 of 583.
Learn more
the frost range covers how to read the range around Mount Airy's dates instead of trusting one. local microclimates covers what one yard in Mount Airy can differ from the 21771 normal.