Delaware City, DE 19731 Frost Dates
19731, near Delaware City, DE: the frost window
Around 04/07 is the usual last spring frost, about 222 days away. Fall's first freeze usually shows up around 11/01, roughly 209 days after the last spring frost.
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.
Stretching the season past the first frost
Delaware City's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Delaware City's last frost
04/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/21 and only about 1 year in 10 sees frost after that.
Delaware City against the rest of the dataset
About 209 days separate Delaware City's last and first frost, putting it 15,275 of 40,283 ZIP codes nationally. Within DE, it ranks 61 of 96.
Learn more
Two guides worth reading on 19731: the frost range, on how to read the range around Delaware City's dates instead of trusting one, and local microclimates, on what one yard in Delaware City can differ from the 19731 normal.