Monroeville, PA 15146 Frost Dates
When can you plant in Monroeville, PA?
Around 05/02 is the usual last spring frost, about 247 days away. The first fall frost typically arrives around 10/20, about 170 frost-free days later.
Zone 6b (-5 to 0°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Monroeville, not a forecast for this year.
What to do before the first frost
About 8 weeks of growing season left in Monroeville before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Monroeville compares
At roughly 170 frost-free days, Monroeville places 28,907 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,457 of 2,088.
Learn more
local microclimates covers what one yard in Monroeville can differ from the 15146 normal. zone vs. frost date covers why Zone 6b and Monroeville's frost date answer different questions.