West Middletown, PA 15379 Frost Dates
15379, near West Middletown, PA: the frost window
Typically, the last spring freeze lands around 04/23, roughly 238 days out. Fall's first freeze usually shows up around 10/25, roughly 185 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts West Middletown 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
West Middletown'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.
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 04/06 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.
West Middletown against the rest of the dataset
At roughly 185 frost-free days, West Middletown places 23,354 of 40,283 ZIP codes in this dataset. Within PA, it ranks 748 of 2,088.
Learn more
Two guides worth reading on 15379: zone vs. frost date, on why Zone 6b and West Middletown's frost date answer different questions, and the frost range, on how to read the range around West Middletown's dates instead of trusting one.