Tionesta, PA 16332 Frost Dates
Tionesta, PA: when does the frost end?
Typically, the last spring freeze lands around 05/06, roughly 251 days out. Fall's first freeze usually shows up around 10/14, roughly 160 days after the last spring frost.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Tionesta, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Tionesta's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/06 isn't a guarantee
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/23 and only about 1 year in 10 sees frost after that.
Tionesta against the rest of the dataset
Tionesta's growing season runs about 160 days, ranking 32,498 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,720 of 2,088.
Learn more
Before leaning on 16332's figures: local microclimates explains what one yard in Tionesta can differ from the 16332 normal, while zone vs. frost date explains why Zone 6a and Tionesta's frost date answer different questions.