Walkersville, MD 21705 Frost Dates
21705, near Walkersville, MD: the frost window
Around 04/02 is the usual last spring frost, about 217 days away. Fall's first freeze usually shows up around 11/06, roughly 218 days after the last spring frost.
Zone 7b (5 to 10°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 Walkersville, not a forecast for this year.
Stretching the season past the first frost
Walkersville's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/02 isn't a guarantee
04/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/15 and only about 1 year in 10 sees frost after that.
Walkersville against the rest of the dataset
At roughly 218 frost-free days, Walkersville places 13,257 of 40,283 ZIP codes in this dataset. Within MD, it ranks 257 of 583.
Learn more
Two guides worth reading on 21705: the frost range, on how to read the range around Walkersville's dates instead of trusting one, and local microclimates, on what one yard in Walkersville can differ from the 21705 normal.