Harveys Lake, PA 18654 Frost Dates
Harveys Lake, PA: when does the frost end?
Around 04/23 is the usual last spring frost, about 238 days away. Fall's first freeze usually shows up around 10/20, roughly 178 days after the last spring frost.
Zone 6a (-10 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 Harveys Lake, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Harveys Lake's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/23 isn't a guarantee
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Harveys Lake against the rest of the dataset
At roughly 178 frost-free days, Harveys Lake places 25,729 of 40,283 ZIP codes in this dataset. Within PA, it ranks 917 of 2,088.
Learn more
Before leaning on 18654's figures: zone vs. frost date explains why Zone 6a and Harveys Lake's frost date answer different questions, while the frost range explains how to read the range around Harveys Lake's dates instead of trusting one.