Delaware City, DE 19896 Frost Dates
Delaware City, DE: when does the frost end?
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.
The USDA Plant Hardiness Zone Map puts Delaware City in Zone 7b (5 to 10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 9 weeks until Delaware City's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
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
Delaware City's growing season runs about 209 days, ranking 15,287 of 40,283 US ZIP codes measured here, longest to shortest. Within DE, it ranks 73 of 96.
Learn more
Before leaning on 19896's figures: local microclimates explains what one yard in Delaware City can differ from the 19896 normal, while zone vs. frost date explains why Zone 7b and Delaware City's frost date answer different questions.