Butler, PA 16003 Frost Dates
Butler, PA: when does the frost end?
Around 04/16 is the usual last spring frost, about 231 days away. Fall's first freeze usually shows up around 11/02, roughly 199 days after the last spring frost.
Butler sits in USDA Zone 6b (-5 to 0°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 9 weeks until Butler's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Butler's last frost
04/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Butler against the rest of the dataset
About 199 days separate Butler's last and first frost, putting it 18,055 of 40,283 ZIP codes nationally. Within PA, it ranks 284 of 2,088.
Learn more
Before leaning on 16003's figures: the frost range explains how to read the range around Butler's dates instead of trusting one, while local microclimates explains what one yard in Butler can differ from the 16003 normal.