Madison, PA 15663 Frost Dates
15663, near Madison, PA: the frost window
Typically, the last spring freeze lands around 05/01, roughly 246 days out. Fall's first freeze usually shows up around 10/13, roughly 164 days after the last spring frost.
Madison sits in USDA Zone 6b (-5 to 0°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
Madison's growing season runs out in roughly 7 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 Madison's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Madison against the rest of the dataset
At roughly 164 frost-free days, Madison places 31,161 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,615 of 2,088.
Learn more
Two guides worth reading on 15663: the frost range, on how to read the range around Madison's dates instead of trusting one, and local microclimates, on what one yard in Madison can differ from the 15663 normal.