Mount Oliver, PA 15211 Frost Dates
Frost dates for Mount Oliver, PA, ZIP 15211
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 Mount Oliver 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
Zone 6b around Mount Oliver has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
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 Mount Oliver compares
At roughly 193 frost-free days, Mount Oliver places 19,925 of 40,283 ZIP codes in this dataset. Within PA, it ranks 471 of 2,088.
Learn more
local microclimates explains what one yard in Mount Oliver can differ from the 15211 normal, and zone vs. frost date explains why Zone 6b and Mount Oliver's frost date answer different questions.