Angoon, AK 99820 Frost Dates
Frost dates for Angoon, AK, ZIP 99820
Typically, the last spring freeze lands around 04/29, roughly 244 days out. The first fall frost typically arrives around 10/25, about 176 frost-free days later.
The USDA Plant Hardiness Zone Map puts Angoon 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
Zone 7a around Angoon has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/29 isn't a guarantee
04/29 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Angoon compares
At roughly 176 frost-free days, Angoon places 26,623 of 40,283 ZIP codes in this dataset. Within AK, it ranks 13 of 269.
Learn more
zone vs. frost date explains why Zone 7a and Angoon's frost date answer different questions, and the frost range explains how to read the range around Angoon's dates instead of trusting one.