Arnold, PA 15030 Frost Dates
When can you plant in Arnold, PA?
Around 04/16 is the usual last spring frost, about 231 days away. The first fall frost typically arrives around 11/02, about 199 frost-free days later.
Arnold 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.
What to do before the first frost
About 9 weeks of growing season left in Arnold before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Arnold's last frost
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 05/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Arnold compares
At roughly 199 frost-free days, Arnold places 18,099 of 40,283 ZIP codes in this dataset. Within PA, it ranks 296 of 2,088.
Learn more
local microclimates covers what one yard in Arnold can differ from the 15030 normal. zone vs. frost date covers why Zone 6b and Arnold's frost date answer different questions.