Gustavus, AK 99826 Frost Dates
When can you plant in Gustavus, AK?
The last spring frost here typically falls around 05/28, about 273 days from today. The first fall frost typically arrives around 09/25, about 116 frost-free days later.
The USDA Plant Hardiness Zone Map puts Gustavus in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 4 weeks of growing season left in Gustavus before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Gustavus's last frost
05/28 is the middle of 30 years of NOAA records, not a promise. Plant by 05/12 and you're betting against frost in roughly 9 years out of 10. 06/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Gustavus compares
About 116 days separate Gustavus's last and first frost, putting it 39,286 of 40,283 ZIP codes nationally. Within AK, it ranks 142 of 269.
Learn more
zone vs. frost date covers why Zone 7a and Gustavus's frost date answer different questions. the frost range covers how to read the range around Gustavus's dates instead of trusting one.