Kenai, AK 99667 Frost Dates
Kenai, AK: when does the frost end?
The last spring frost here typically falls around 05/23, about 268 days from today. Fall's first freeze usually shows up around 09/09, roughly 109 days after the last spring frost.
Kenai 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 2 weeks until Kenai's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Kenai's last frost
05/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/04 and only about 1 year in 10 sees frost after that.
Kenai against the rest of the dataset
At roughly 109 frost-free days, Kenai places 39,520 of 40,283 ZIP codes in this dataset. Within AK, it ranks 178 of 269.
Learn more
Before leaning on 99667's figures: local microclimates explains what one yard in Kenai can differ from the 99667 normal, while zone vs. frost date explains why Zone 4b and Kenai's frost date answer different questions.