Delaware City, DE 19718 Frost Dates
Frost dates for Delaware City, DE, ZIP 19718
The last spring frost here typically falls around 04/07, about 222 days from today. The first fall frost typically arrives around 11/01, about 209 frost-free days later.
Zone 7b (5 to 10°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 Delaware City, not a forecast for this year.
What to do before the first frost
Zone 7b around Delaware City has about 9 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.
The actual range around Delaware City's last frost
04/07 is the middle of 30 years of NOAA records, not a promise. Plant by 03/26 and you're betting against frost in roughly 9 years out of 10. 04/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Delaware City compares
Delaware City's growing season runs about 209 days, ranking 15,271 of 40,283 US ZIP codes measured here, longest to shortest. Within DE, it ranks 57 of 96.
Learn more
the frost range explains how to read the range around Delaware City's dates instead of trusting one, and local microclimates explains what one yard in Delaware City can differ from the 19718 normal.