Warren, PA 16345 Frost Dates
Warren, PA: when does the frost end?
Typically, the last spring freeze lands around 05/22, roughly 267 days out. Fall's first freeze usually shows up around 09/30, roughly 131 days after the last spring frost.
Warren sits in USDA Zone 6a (-10 to -5°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
With roughly 5 weeks until Warren's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/22 isn't a guarantee
05/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/05 and only about 1 year in 10 sees frost after that.
Warren against the rest of the dataset
Warren's growing season runs about 131 days, ranking 38,254 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 2,063 of 2,088.
Learn more
Before leaning on 16345's figures: the frost range explains how to read the range around Warren's dates instead of trusting one, while local microclimates explains what one yard in Warren can differ from the 16345 normal.