Whitehall, PA 15236 Frost Dates
When can you plant in Whitehall, PA?
The last spring frost here typically falls around 04/18, about 233 days from today. The first fall frost typically arrives around 10/28, about 193 frost-free days later.
The USDA Plant Hardiness Zone Map puts Whitehall in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 9 weeks of growing season left in Whitehall before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Whitehall's last frost
04/18 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Whitehall compares
Whitehall's growing season runs about 193 days, ranking 19,755 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 413 of 2,088.
Learn more
local microclimates covers what one yard in Whitehall can differ from the 15236 normal. zone vs. frost date covers why Zone 6b and Whitehall's frost date answer different questions.