Wasilla, AK 99654 Frost Dates
When can you plant in Wasilla, AK?
Around 05/16 is the usual last spring frost, about 261 days away. The first fall frost typically arrives around 09/23, about 128 frost-free days later.
The USDA Plant Hardiness Zone Map puts Wasilla in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 4 weeks of growing season left in Wasilla before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Wasilla's last frost
05/16 is the middle of 30 years of NOAA records, not a promise. Plant by 05/01 and you're betting against frost in roughly 9 years out of 10. 05/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Wasilla compares
At roughly 128 frost-free days, Wasilla places 38,534 of 40,283 ZIP codes in this dataset. Within AK, it ranks 80 of 269.
Learn more
zone vs. frost date covers why Zone 5a and Wasilla's frost date answer different questions. the frost range covers how to read the range around Wasilla's dates instead of trusting one.