Newhalen, AK 99647 Frost Dates
Newhalen, AK: when does the frost end?
The last spring frost here typically falls around 06/04, about 280 days from today. Fall's first freeze usually shows up around 09/12, roughly 98 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Newhalen in Zone 4b (-25 to -20°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 2 weeks until Newhalen's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 06/04 isn't a guarantee
06/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/22 and only about 1 year in 10 sees frost after that.
Newhalen against the rest of the dataset
Newhalen's growing season runs about 98 days, ranking 39,769 of 40,283 US ZIP codes measured here, longest to shortest. Within AK, it ranks 204 of 269.
Learn more
Before leaning on 99647's figures: the frost range explains how to read the range around Newhalen's dates instead of trusting one, while local microclimates explains what one yard in Newhalen can differ from the 99647 normal.