North Chevy Chase, MD 20910 Frost Dates
20910, near North Chevy Chase, MD: the frost window
Typically, the last spring freeze lands around 04/10, roughly 225 days out. Fall's first freeze usually shows up around 11/01, roughly 202 days after the last spring frost.
North Chevy Chase sits in USDA Zone 7b (5 to 10°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.
Stretching the season past the first frost
North Chevy Chase's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/01 and only about 1 year in 10 sees frost after that.
North Chevy Chase against the rest of the dataset
At roughly 202 frost-free days, North Chevy Chase places 17,319 of 40,283 ZIP codes in this dataset. Within MD, it ranks 436 of 583.
Learn more
Two guides worth reading on 20910: zone vs. frost date, on why Zone 7b and North Chevy Chase's frost date answer different questions, and the frost range, on how to read the range around North Chevy Chase's dates instead of trusting one.