Moscow, PA 18444 Frost Dates
Frost dates for Moscow, PA, ZIP 18444
Typically, the last spring freeze lands around 04/23, roughly 238 days out. The first fall frost typically arrives around 10/20, about 178 frost-free days later.
Moscow sits in USDA Zone 6a (-10 to -5°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
Zone 6a around Moscow has about 8 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.
Why 04/23 isn't a guarantee
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. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Moscow compares
Moscow's growing season runs about 178 days, ranking 25,760 of 40,283 US ZIP codes measured here, longest to shortest. Within PA, it ranks 925 of 2,088.
Learn more
the frost range explains how to read the range around Moscow's dates instead of trusting one, and local microclimates explains what one yard in Moscow can differ from the 18444 normal.