Juneau, AK 99803 Frost Dates
Juneau, AK: when does the frost end?
Around 04/27 is the usual last spring frost, about 242 days away. Fall's first freeze usually shows up around 10/18, roughly 172 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Juneau in Zone 7a (0 to 5°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
With roughly 7 weeks until Juneau's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/27 isn't a guarantee
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Juneau against the rest of the dataset
About 172 days separate Juneau's last and first frost, putting it 28,168 of 40,283 ZIP codes nationally. Within AK, it ranks 14 of 269.
Learn more
Before leaning on 99803's figures: zone vs. frost date explains why Zone 7a and Juneau's frost date answer different questions, while the frost range explains how to read the range around Juneau's dates instead of trusting one.