Ridley Park, PA 19039 Frost Dates
19039, near Ridley Park, PA: the frost window
The last spring frost here typically falls around 04/02, about 217 days from today. Fall's first freeze usually shows up around 11/10, roughly 224 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 Ridley Park, not a forecast for this year.
Stretching the season past the first frost
Ridley Park'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.
Ridley Park against the rest of the dataset
Ridley Park's growing season runs about 224 days, ranking 11,816 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 10 of 2,088.
Learn more
Two guides worth reading on 19039: zone vs. frost date, on why Zone 7b and Ridley Park's frost date answer different questions, and the frost range, on how to read the range around Ridley Park's dates instead of trusting one.