Chuathbaluk, AK 99575 Frost Dates
99575, near Chuathbaluk, AK: the frost window
The last spring frost here typically falls around 05/13, about 258 days from today. Fall's first freeze usually shows up around 09/13, roughly 120 days after the last spring frost.
Zone 3a (-40 to -35°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Chuathbaluk, not a forecast for this year.
Stretching the season past the first frost
Chuathbaluk's growing season runs out in roughly 2 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/13 isn't a guarantee
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.
Chuathbaluk against the rest of the dataset
At roughly 120 frost-free days, Chuathbaluk places 39,115 of 40,283 ZIP codes in this dataset. Within AK, it ranks 134 of 269.
Learn more
Two guides worth reading on 99575: the frost range, on how to read the range around Chuathbaluk's dates instead of trusting one, and local microclimates, on what one yard in Chuathbaluk can differ from the 99575 normal.