Nikolai, AK 99757 Frost Dates
Frost dates for Nikolai, AK, ZIP 99757
The last spring frost here typically falls around 05/13, about 258 days from today. The first fall frost typically arrives around 09/17, about 124 frost-free days later.
The USDA Plant Hardiness Zone Map puts Nikolai in Zone 2b (-45 to -40°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 2b around Nikolai has about 3 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 05/13 isn't a guarantee
05/13 is the middle of 30 years of NOAA records, not a promise. Plant by 05/03 and you're betting against frost in roughly 9 years out of 10. 05/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Nikolai compares
About 124 days separate Nikolai's last and first frost, putting it 38,876 of 40,283 ZIP codes nationally. Within AK, it ranks 97 of 269.
Learn more
the frost range explains how to read the range around Nikolai's dates instead of trusting one, and local microclimates explains what one yard in Nikolai can differ from the 99757 normal.