Delaware City, DE 19891 Frost Dates
When can you plant in Delaware City, DE?
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
About 9 weeks of growing season left in Delaware City before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
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 15,282 of 40,283 ZIP codes nationally. Within DE, it ranks 68 of 96.
Learn more
local microclimates covers what one yard in Delaware City can differ from the 19891 normal. zone vs. frost date covers why Zone 7b and Delaware City's frost date answer different questions.