North Wales, PA 19437 Frost Dates
North Wales, PA: when does the frost end?
Around 04/11 is the usual last spring frost, about 226 days away. Fall's first freeze usually shows up around 11/01, roughly 205 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts North Wales in Zone 7a (0 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
With roughly 9 weeks until North Wales's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/11 isn't a guarantee
04/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/27 and only about 1 year in 10 sees frost after that.
North Wales against the rest of the dataset
At roughly 205 frost-free days, North Wales places 16,289 of 40,283 ZIP codes in this dataset. Within PA, it ranks 152 of 2,088.
Learn more
Before leaning on 19437's figures: zone vs. frost date explains why Zone 7a and North Wales's frost date answer different questions, while the frost range explains how to read the range around North Wales's dates instead of trusting one.