Knoxville, PA 14898 Frost Dates
14898, near Knoxville, PA: the frost window
The last spring frost here typically falls around 05/14, about 259 days from today. Fall's first freeze usually shows up around 10/05, roughly 144 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Knoxville in Zone 5b (-15 to -10°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
Knoxville'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 Knoxville's last frost
05/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/28 and only about 1 year in 10 sees frost after that.
Knoxville against the rest of the dataset
Knoxville's growing season runs about 144 days, ranking 36,427 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,929 of 2,088.
Learn more
Two guides worth reading on 14898: local microclimates, on what one yard in Knoxville can differ from the 14898 normal, and zone vs. frost date, on why Zone 5b and Knoxville's frost date answer different questions.