Nondalton, AK 99653 Frost Dates
99653, near Nondalton, AK: the frost window
Typically, the last spring freeze lands around 06/02, roughly 278 days out. Fall's first freeze usually shows up around 09/12, roughly 101 days after the last spring frost.
Zone 4a (-30 to -25°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 Nondalton, not a forecast for this year.
Stretching the season past the first frost
Nondalton'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.
The actual range around Nondalton's last frost
06/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/13 and only about 1 year in 10 sees frost after that.
Nondalton against the rest of the dataset
Nondalton's growing season runs about 101 days, ranking 39,696 of 40,283 US ZIP codes measured here, longest to shortest. Within AK, it ranks 192 of 269.
Learn more
Two guides worth reading on 99653: zone vs. frost date, on why Zone 4a and Nondalton's frost date answer different questions, and the frost range, on how to read the range around Nondalton's dates instead of trusting one.