Carroll Valley, PA 17320 Frost Dates
Carroll Valley, PA: when does the frost end?
Around 04/22 is the usual last spring frost, about 237 days away. Fall's first freeze usually shows up around 10/20, roughly 179 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Carroll Valley in Zone 7a (0 to 5°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 8 weeks until Carroll Valley'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
04/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
Carroll Valley against the rest of the dataset
At roughly 179 frost-free days, Carroll Valley places 25,296 of 40,283 ZIP codes in this dataset. Within PA, it ranks 868 of 2,088.
Learn more
Before leaning on 17320's figures: local microclimates explains what one yard in Carroll Valley can differ from the 17320 normal, while zone vs. frost date explains why Zone 7a and Carroll Valley's frost date answer different questions.