Forest Heights, MD 22308 Frost Dates
Frost dates for Forest Heights, MD, ZIP 22308
The last spring frost here typically falls around 04/03, about 218 days from today. The first fall frost typically arrives around 11/08, about 217 frost-free days later.
The USDA Plant Hardiness Zone Map puts Forest Heights 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 Forest Heights 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.
How much risk comes with planting early here
04/03 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 Forest Heights compares
Forest Heights's growing season runs about 217 days, ranking 13,506 of 40,283 US ZIP codes measured here, longest to shortest. Within MD, it ranks 305 of 583.
Learn more
the frost range explains how to read the range around Forest Heights's dates instead of trusting one, and local microclimates explains what one yard in Forest Heights can differ from the 22308 normal.