Downingtown, PA 19494 Frost Dates
When can you plant in Downingtown, PA?
The last spring frost here typically falls around 04/26, about 241 days from today. The first fall frost typically arrives around 10/18, about 174 frost-free days later.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Downingtown, not a forecast for this year.
What to do before the first frost
About 7 weeks of growing season left in Downingtown before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Downingtown's last frost
04/26 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. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Downingtown compares
About 174 days separate Downingtown's last and first frost, putting it 27,423 of 40,283 ZIP codes nationally. Within PA, it ranks 1,298 of 2,088.
Learn more
the frost range covers how to read the range around Downingtown's dates instead of trusting one. local microclimates covers what one yard in Downingtown can differ from the 19494 normal.