Moscow, PA 18416 Frost Dates
18416, near Moscow, PA: the frost window
Around 04/23 is the usual last spring frost, about 238 days away. Fall's first freeze usually shows up around 10/20, roughly 178 days after the last spring frost.
Moscow sits in USDA Zone 6b (-5 to 0°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.
Stretching the season past the first frost
Moscow's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/23 isn't a guarantee
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Moscow against the rest of the dataset
About 178 days separate Moscow's last and first frost, putting it 25,759 of 40,283 ZIP codes nationally. Within PA, it ranks 924 of 2,088.
Learn more
Two guides worth reading on 18416: local microclimates, on what one yard in Moscow can differ from the 18416 normal, and zone vs. frost date, on why Zone 6b and Moscow's frost date answer different questions.