Chuathbaluk, AK 99557 Frost Dates
99557, near Chuathbaluk, AK: the frost window
Around 05/21 is the usual last spring frost, about 266 days away. Fall's first freeze usually shows up around 09/22, roughly 122 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Chuathbaluk in Zone 3a (-40 to -35°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
Chuathbaluk's growing season runs out in roughly 4 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Chuathbaluk's last frost
05/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/02 and only about 1 year in 10 sees frost after that.
Chuathbaluk against the rest of the dataset
About 122 days separate Chuathbaluk's last and first frost, putting it 38,986 of 40,283 ZIP codes nationally. Within AK, it ranks 130 of 269.
Learn more
Two guides worth reading on 99557: 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 99557 normal.