Jessup, PA 18436 Frost Dates
18436, near Jessup, PA: the frost window
Typically, the last spring freeze lands around 04/23, roughly 238 days out. Fall's first freeze usually shows up around 10/20, roughly 178 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Jessup in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Jessup's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Jessup's last frost
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Jessup against the rest of the dataset
At roughly 178 frost-free days, Jessup places 25,704 of 40,283 ZIP codes in this dataset. Within PA, it ranks 913 of 2,088.
Learn more
Two guides worth reading on 18436: the frost range, on how to read the range around Jessup's dates instead of trusting one, and local microclimates, on what one yard in Jessup can differ from the 18436 normal.