Clarendon, PA 16313 Frost Dates
16313, near Clarendon, PA: the frost window
The last spring frost here typically falls around 05/22, about 267 days from today. Fall's first freeze usually shows up around 09/30, roughly 131 days after the last spring frost.
Clarendon 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
Clarendon'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.
How much risk comes with planting early here
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.
Clarendon against the rest of the dataset
Clarendon's growing season runs about 131 days, ranking 38,331 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 2,084 of 2,088.
Learn more
Two guides worth reading on 16313: the frost range, on how to read the range around Clarendon's dates instead of trusting one, and local microclimates, on what one yard in Clarendon can differ from the 16313 normal.