Fairbanks, AK 99710 Frost Dates
Fairbanks, AK: when does the frost end?
Typically, the last spring freeze lands around 05/12, roughly 257 days out. Fall's first freeze usually shows up around 09/16, roughly 124 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Fairbanks in Zone 2b (-45 to -40°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 3 weeks until Fairbanks's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Fairbanks's last frost
05/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/29 and only about 1 year in 10 sees frost after that.
Fairbanks against the rest of the dataset
About 124 days separate Fairbanks's last and first frost, putting it 38,822 of 40,283 ZIP codes nationally. Within AK, it ranks 94 of 269.
Learn more
Before leaning on 99710's figures: the frost range explains how to read the range around Fairbanks's dates instead of trusting one, while local microclimates explains what one yard in Fairbanks can differ from the 99710 normal.