North Wales, PA 19409 Frost Dates
When can you plant in North Wales, PA?
Around 04/24 is the usual last spring frost, about 239 days away. The first fall frost typically arrives around 10/15, about 173 frost-free days later.
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.
What to do before the first frost
About 7 weeks of growing season left in North Wales before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around North Wales's last frost
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How North Wales compares
North Wales's growing season runs about 173 days, ranking 27,895 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,322 of 2,088.
Learn more
local microclimates covers what one yard in North Wales can differ from the 19409 normal. zone vs. frost date covers why Zone 7a and North Wales's frost date answer different questions.