Ambridge, PA 15003 Frost Dates
Ambridge, PA: when does the frost end?
Around 04/28 is the usual last spring frost, about 243 days away. Fall's first freeze usually shows up around 10/18, roughly 172 days after the last spring frost.
Zone 6b (-5 to 0°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 Ambridge, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Ambridge's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Ambridge's last frost
04/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Ambridge against the rest of the dataset
At roughly 172 frost-free days, Ambridge places 28,254 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,341 of 2,088.
Learn more
Before leaning on 15003's figures: zone vs. frost date explains why Zone 6b and Ambridge's frost date answer different questions, while the frost range explains how to read the range around Ambridge's dates instead of trusting one.