Three Springs, PA 17229 Frost Dates
17229, near Three Springs, PA: the frost window
Around 04/23 is the usual last spring frost, about 238 days away. Fall's first freeze usually shows up around 10/21, roughly 177 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Three Springs in Zone 6b (-5 to 0°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
Three Springs's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Three Springs against the rest of the dataset
About 177 days separate Three Springs's last and first frost, putting it 26,235 of 40,283 ZIP codes nationally. Within PA, it ranks 983 of 2,088.
Learn more
Two guides worth reading on 17229: local microclimates, on what one yard in Three Springs can differ from the 17229 normal, and zone vs. frost date, on why Zone 6b and Three Springs's frost date answer different questions.