Fort Yukon, AK 99724 Frost Dates
99724, near Fort Yukon, AK: the frost window
Typically, the last spring freeze lands around 05/28, roughly 273 days out. Fall's first freeze usually shows up around 08/26, roughly 87 days after the last spring frost.
Fort Yukon sits in USDA Zone 1a (-60 to -55°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.
Protecting what you plant early
About 39 weeks to go until the last frost in Fort Yukon — anything tender already in the ground is still at risk until that date passes, which is what frost cloth is for.
How much risk comes with planting early here
05/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/19 and only about 1 year in 10 sees frost after that.
Fort Yukon against the rest of the dataset
About 87 days separate Fort Yukon's last and first frost, putting it 39,968 of 40,283 ZIP codes nationally. Within AK, it ranks 238 of 269.
Learn more
Two guides worth reading on 99724: local microclimates, on what one yard in Fort Yukon can differ from the 99724 normal, and zone vs. frost date, on why Zone 1a and Fort Yukon's frost date answer different questions.