Dover, PA 17315 Frost Dates
Frost dates for Dover, PA, ZIP 17315
Around 04/27 is the usual last spring frost, about 242 days away. The first fall frost typically arrives around 10/18, about 174 frost-free days later.
Dover sits in USDA Zone 7a (0 to 5°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.
What to do before the first frost
Zone 7a around Dover has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Dover compares
At roughly 174 frost-free days, Dover places 27,507 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,308 of 2,088.
Learn more
the frost range explains how to read the range around Dover's dates instead of trusting one, and local microclimates explains what one yard in Dover can differ from the 17315 normal.