Nightmute, AK 99690 Frost Dates
When can you plant in Nightmute, AK?
Typically, the last spring freeze lands around 05/21, roughly 266 days out. The first fall frost typically arrives around 09/22, about 122 frost-free days later.
The USDA Plant Hardiness Zone Map puts Nightmute 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
About 4 weeks of growing season left in Nightmute before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
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 Nightmute compares
Nightmute's growing season runs about 122 days, ranking 38,980 of 40,283 US ZIP codes measured here, longest to shortest. Within AK, it ranks 125 of 269.
Learn more
the frost range covers how to read the range around Nightmute's dates instead of trusting one. local microclimates covers what one yard in Nightmute can differ from the 99690 normal.