Selawik, AK 99770 Frost Dates
Frost dates for Selawik, AK, ZIP 99770
Typically, the last spring freeze lands around 06/05, roughly 281 days out. The first fall frost typically arrives around 09/24, about 110 frost-free days later.
Selawik sits in USDA Zone 2a (-50 to -45°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 2a around Selawik 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.
The actual range around Selawik's last frost
06/05 is the middle of 30 years of NOAA records, not a promise. Plant by 05/20 and you're betting against frost in roughly 9 years out of 10. 06/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Selawik compares
At roughly 110 frost-free days, Selawik places 39,507 of 40,283 ZIP codes in this dataset. Within AK, it ranks 174 of 269.
Learn more
zone vs. frost date explains why Zone 2a and Selawik's frost date answer different questions, and the frost range explains how to read the range around Selawik's dates instead of trusting one.