Eek, AK 99578 Frost Dates
99578, near Eek, 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 Eek in Zone 4a (-30 to -25°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
Eek'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.
Why 05/21 isn't a guarantee
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.
Eek against the rest of the dataset
At roughly 122 frost-free days, Eek places 38,976 of 40,283 ZIP codes in this dataset. Within AK, it ranks 122 of 269.
Learn more
Two guides worth reading on 99578: zone vs. frost date, on why Zone 4a and Eek's frost date answer different questions, and the frost range, on how to read the range around Eek's dates instead of trusting one.