Lewis Run, PA 16744 Frost Dates
16744, near Lewis Run, PA: the frost window
Around 05/18 is the usual last spring frost, about 263 days away. Fall's first freeze usually shows up around 10/01, roughly 136 days after the last spring frost.
Lewis Run sits in USDA Zone 5b (-15 to -10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Lewis Run's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Lewis Run's last frost
05/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/31 and only about 1 year in 10 sees frost after that.
Lewis Run against the rest of the dataset
At roughly 136 frost-free days, Lewis Run places 37,757 of 40,283 ZIP codes in this dataset. Within PA, it ranks 2,061 of 2,088.
Learn more
Two guides worth reading on 16744: the frost range, on how to read the range around Lewis Run's dates instead of trusting one, and local microclimates, on what one yard in Lewis Run can differ from the 16744 normal.