Chefornak, AK 99614 Frost Dates
Frost dates for Chefornak, AK, ZIP 99614
The last spring frost here typically falls around 05/21, about 266 days from today. The first fall frost typically arrives around 09/22, about 122 frost-free days later.
The USDA Plant Hardiness Zone Map puts Chefornak in Zone 4a (-30 to -25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 4a around Chefornak has about 4 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 05/21 isn't a guarantee
05/21 is the middle of 30 years of NOAA records, not a promise. Plant by 05/08 and you're betting against frost in roughly 9 years out of 10. 06/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Chefornak compares
Chefornak's growing season runs about 122 days, ranking 38,967 of 40,283 US ZIP codes measured here, longest to shortest. Within AK, it ranks 116 of 269.
Learn more
local microclimates explains what one yard in Chefornak can differ from the 99614 normal, and zone vs. frost date explains why Zone 4a and Chefornak's frost date answer different questions.