Narberth, PA 19066 Frost Dates
19066, near Narberth, PA: the frost window
Typically, the last spring freeze lands around 04/08, roughly 223 days out. Fall's first freeze usually shows up around 10/31, roughly 203 days after the last spring frost.
Narberth 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
Narberth's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/08 isn't a guarantee
04/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/23 and only about 1 year in 10 sees frost after that.
Narberth against the rest of the dataset
Narberth's growing season runs about 203 days, ranking 16,909 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 205 of 2,088.
Learn more
Two guides worth reading on 19066: the frost range, on how to read the range around Narberth's dates instead of trusting one, and local microclimates, on what one yard in Narberth can differ from the 19066 normal.