Summit Hill, PA 18211 Frost Dates
Summit Hill, PA: when does the frost end?
Around 04/21 is the usual last spring frost, about 236 days away. Fall's first freeze usually shows up around 10/23, roughly 184 days after the last spring frost.
Summit Hill 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 8 weeks until Summit Hill's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
Summit Hill against the rest of the dataset
About 184 days separate Summit Hill's last and first frost, putting it 23,543 of 40,283 ZIP codes nationally. Within PA, it ranks 794 of 2,088.
Learn more
Before leaning on 18211's figures: local microclimates explains what one yard in Summit Hill can differ from the 18211 normal, while zone vs. frost date explains why Zone 6b and Summit Hill's frost date answer different questions.