Colwyn, PA 19176 Frost Dates
19176, near Colwyn, PA: the frost window
Around 04/02 is the usual last spring frost, about 217 days away. Fall's first freeze usually shows up around 11/10, roughly 224 days after the last spring frost.
Colwyn 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
Colwyn's growing season runs out in roughly 11 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 03/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/13 and only about 1 year in 10 sees frost after that.
Colwyn against the rest of the dataset
About 224 days separate Colwyn's last and first frost, putting it 11,893 of 40,283 ZIP codes nationally. Within PA, it ranks 38 of 2,088.
Learn more
Two guides worth reading on 19176: zone vs. frost date, on why Zone 7b and Colwyn's frost date answer different questions, and the frost range, on how to read the range around Colwyn's dates instead of trusting one.