Montrose, PA 18816 Frost Dates
Frost dates for Montrose, PA, ZIP 18816
The last spring frost here typically falls around 05/14, about 259 days from today. The first fall frost typically arrives around 10/01, about 140 frost-free days later.
Zone 6a (-10 to -5°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 Montrose, not a forecast for this year.
What to do before the first frost
Zone 6a around Montrose has about 5 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
05/14 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Montrose compares
Montrose's growing season runs about 140 days, ranking 37,071 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 1,991 of 2,088.
Learn more
local microclimates explains what one yard in Montrose can differ from the 18816 normal, and zone vs. frost date explains why Zone 6a and Montrose's frost date answer different questions.