Knoxville, PA 14885 Frost Dates
Knoxville, PA: when does the frost end?
Typically, the last spring freeze lands around 05/14, roughly 259 days out. Fall's first freeze usually shows up around 10/05, roughly 144 days after the last spring frost.
Knoxville 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 Knoxville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
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
About 144 days separate Knoxville's last and first frost, putting it 36,426 of 40,283 ZIP codes nationally. Within PA, it ranks 1,928 of 2,088.
Learn more
Before leaning on 14885's figures: local microclimates explains what one yard in Knoxville can differ from the 14885 normal, while zone vs. frost date explains why Zone 6a and Knoxville's frost date answer different questions.