Moscow, PA 18445 Frost Dates
18445, near Moscow, PA: the frost window
The last spring frost here typically falls around 05/06, about 251 days from today. Fall's first freeze usually shows up around 10/08, roughly 154 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Moscow in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Moscow's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/06 isn't a guarantee
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/23 and only about 1 year in 10 sees frost after that.
Moscow against the rest of the dataset
At roughly 154 frost-free days, Moscow places 34,336 of 40,283 ZIP codes in this dataset. Within PA, it ranks 1,892 of 2,088.
Learn more
Two guides worth reading on 18445: local microclimates, on what one yard in Moscow can differ from the 18445 normal, and zone vs. frost date, on why Zone 6a and Moscow's frost date answer different questions.