Ambler, PA 19025 Frost Dates
Ambler, PA: when does the frost end?
The last spring frost here typically falls around 04/11, about 226 days from today. Fall's first freeze usually shows up around 11/01, roughly 205 days after the last spring frost.
Ambler sits in USDA Zone 7b (5 to 10°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 Ambler's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Ambler's last frost
04/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/27 and only about 1 year in 10 sees frost after that.
Ambler against the rest of the dataset
About 205 days separate Ambler's last and first frost, putting it 16,232 of 40,283 ZIP codes nationally. Within PA, it ranks 142 of 2,088.
Learn more
Before leaning on 19025's figures: zone vs. frost date explains why Zone 7b and Ambler's frost date answer different questions, while the frost range explains how to read the range around Ambler's dates instead of trusting one.