Christiana, PA 17509 Frost Dates
Christiana, PA: when does the frost end?
The last spring frost here typically falls around 04/19, about 234 days from today. Fall's first freeze usually shows up around 10/26, roughly 189 days after the last spring frost.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Christiana, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Christiana's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Christiana's last frost
04/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/03 and only about 1 year in 10 sees frost after that.
Christiana against the rest of the dataset
Christiana's growing season runs about 189 days, ranking 21,643 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 573 of 2,088.
Learn more
Before leaning on 17509's figures: zone vs. frost date explains why Zone 7a and Christiana's frost date answer different questions, while the frost range explains how to read the range around Christiana's dates instead of trusting one.