Soldotna, AK 99568 Frost Dates
99568, near Soldotna, AK: the frost window
The last spring frost here typically falls around 06/11, about 287 days from today. Fall's first freeze usually shows up around 09/01, roughly 75 days after the last spring frost.
Soldotna sits in USDA Zone 5a (-20 to -15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Soldotna's growing season runs out in roughly 1 week — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 06/11 isn't a guarantee
06/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 07/07 and only about 1 year in 10 sees frost after that.
Soldotna against the rest of the dataset
Soldotna's growing season runs about 75 days, ranking 40,094 of 40,283 US ZIP codes measured here, longest to shortest. Within AK, it ranks 252 of 269.
Learn more
Two guides worth reading on 99568: zone vs. frost date, on why Zone 5a and Soldotna's frost date answer different questions, and the frost range, on how to read the range around Soldotna's dates instead of trusting one.