Delaware City, DE 19880 Frost Dates
Frost dates for Delaware City, DE, ZIP 19880
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.
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.
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
About 209 days separate Delaware City's last and first frost, putting it 15,277 of 40,283 ZIP codes nationally. Within DE, it ranks 63 of 96.
Learn more
zone vs. frost date explains why Zone 7b and Delaware City's frost date answer different questions, and the frost range explains how to read the range around Delaware City's dates instead of trusting one.