False Pass, AK 99583 Frost Dates
False Pass, AK: when does the frost end?
Typically, the last spring freeze lands around 05/25, roughly 270 days out. Fall's first freeze usually shows up around 10/04, roughly 131 days after the last spring frost.
False Pass sits in USDA Zone 7a (0 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.
Stretching the season past the first frost
With roughly 5 weeks until False Pass's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/10 and only about 1 year in 10 sees frost after that.
False Pass against the rest of the dataset
False Pass's growing season runs about 131 days, ranking 38,330 of 40,283 US ZIP codes measured here, longest to shortest. Within AK, it ranks 76 of 269.
Learn more
Before leaning on 99583's figures: local microclimates explains what one yard in False Pass can differ from the 99583 normal, while zone vs. frost date explains why Zone 7a and False Pass's frost date answer different questions.