Delaware City, DE 19897 Frost Dates
Frost dates for Delaware City, DE, ZIP 19897
Typically, the last spring freeze lands around 04/07, roughly 222 days out. The first fall frost typically arrives around 11/01, about 209 frost-free days later.
Delaware City sits in USDA Zone 7b (5 to 10°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 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.
How much risk comes with planting early here
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
About 209 days separate Delaware City's last and first frost, putting it 15,288 of 40,283 ZIP codes nationally. Within DE, it ranks 74 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 19897 normal.