North Wales, PA 19451 Frost Dates
North Wales, PA: when does the frost end?
Around 04/24 is the usual last spring frost, about 239 days away. Fall's first freeze usually shows up around 10/15, roughly 173 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 7 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 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
North Wales against the rest of the dataset
About 173 days separate North Wales's last and first frost, putting it 27,900 of 40,283 ZIP codes nationally. Within PA, it ranks 1,327 of 2,088.
Learn more
Before leaning on 19451's figures: local microclimates explains what one yard in North Wales can differ from the 19451 normal, while zone vs. frost date explains why Zone 7a and North Wales's frost date answer different questions.