Kenai, AK 99682 Frost Dates
When can you plant in Kenai, AK?
Typically, the last spring freeze lands around 06/01, roughly 277 days out. The first fall frost typically arrives around 09/08, about 94 frost-free days later.
Kenai sits in USDA Zone 5a (-20 to -15°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.
What to do before the first frost
About 2 weeks of growing season left in Kenai before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 06/01 isn't a guarantee
06/01 is the middle of 30 years of NOAA records, not a promise. Plant by 05/21 and you're betting against frost in roughly 9 years out of 10. 06/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Kenai compares
At roughly 94 frost-free days, Kenai places 39,822 of 40,283 ZIP codes in this dataset. Within AK, it ranks 210 of 269.
Learn more
local microclimates covers what one yard in Kenai can differ from the 99682 normal. zone vs. frost date covers why Zone 5a and Kenai's frost date answer different questions.