McKees Rocks, PA 15136 Frost Dates
When can you plant in McKees Rocks, PA?
The last spring frost here typically falls around 04/23, about 238 days from today. The first fall frost typically arrives around 10/23, about 181 frost-free days later.
The USDA Plant Hardiness Zone Map puts McKees Rocks 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 8 weeks of growing season left in McKees Rocks before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around McKees Rocks's last frost
04/23 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 and you're betting against frost in roughly 9 years out of 10. 05/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How McKees Rocks compares
McKees Rocks's growing season runs about 181 days, ranking 24,521 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 822 of 2,088.
Learn more
local microclimates covers what one yard in McKees Rocks can differ from the 15136 normal. zone vs. frost date covers why Zone 6b and McKees Rocks's frost date answer different questions.