Dillingham, AK 99628 Frost Dates
Dillingham, AK: when does the frost end?
The last spring frost here typically falls around 05/26, about 271 days from today. Fall's first freeze usually shows up around 09/15, roughly 111 days after the last spring frost.
Dillingham sits in USDA Zone 4b (-25 to -20°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
With roughly 3 weeks until Dillingham's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/11 and only about 1 year in 10 sees frost after that.
Dillingham against the rest of the dataset
At roughly 111 frost-free days, Dillingham places 39,457 of 40,283 ZIP codes in this dataset. Within AK, it ranks 153 of 269.
Learn more
Before leaning on 99628's figures: the frost range explains how to read the range around Dillingham's dates instead of trusting one, while local microclimates explains what one yard in Dillingham can differ from the 99628 normal.