Brevig Mission, AK 99785 Frost Dates
Frost dates for Brevig Mission, AK, ZIP 99785
Typically, the last spring freeze lands around 06/05, roughly 281 days out. The first fall frost typically arrives around 09/03, about 88 frost-free days later.
Brevig Mission sits in USDA Zone 3a (-40 to -35°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 3a around Brevig Mission has about 1 week 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.
How much risk comes with planting early here
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. 06/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Brevig Mission compares
About 88 days separate Brevig Mission's last and first frost, putting it 39,958 of 40,283 ZIP codes nationally. Within AK, it ranks 233 of 269.
Learn more
the frost range explains how to read the range around Brevig Mission's dates instead of trusting one, and local microclimates explains what one yard in Brevig Mission can differ from the 99785 normal.