Palmerton, PA 18058 Frost Dates
Palmerton, 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.
Palmerton 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 Palmerton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Palmerton's last frost
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.
Palmerton against the rest of the dataset
Palmerton's growing season runs about 184 days, ranking 23,494 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 773 of 2,088.
Learn more
Before leaning on 18058's figures: local microclimates explains what one yard in Palmerton can differ from the 18058 normal, while zone vs. frost date explains why Zone 6b and Palmerton's frost date answer different questions.