McGrath, AK 99627 Frost Dates
McGrath, AK: when does the frost end?
Typically, the last spring freeze lands around 05/13, roughly 258 days out. Fall's first freeze usually shows up around 09/13, roughly 120 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts McGrath 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 2 weeks until McGrath's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/28 and only about 1 year in 10 sees frost after that.
McGrath against the rest of the dataset
About 120 days separate McGrath's last and first frost, putting it 39,102 of 40,283 ZIP codes nationally. Within AK, it ranks 132 of 269.
Learn more
Before leaning on 99627's figures: the frost range explains how to read the range around McGrath's dates instead of trusting one, while local microclimates explains what one yard in McGrath can differ from the 99627 normal.