Ambler, PA 19031 Frost Dates
Frost dates for Ambler, PA, ZIP 19031
The last spring frost here typically falls around 04/08, about 223 days from today. The first fall frost typically arrives around 10/31, about 203 frost-free days later.
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.
What to do before the first frost
Zone 7b around Ambler has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Ambler's last frost
04/08 is the middle of 30 years of NOAA records, not a promise. Plant by 03/28 and you're betting against frost in roughly 9 years out of 10. 04/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ambler compares
Ambler's growing season runs about 203 days, ranking 16,881 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 193 of 2,088.
Learn more
the frost range explains how to read the range around Ambler's dates instead of trusting one, and local microclimates explains what one yard in Ambler can differ from the 19031 normal.