Larsen Bay, AK 99624 Frost Dates
Frost dates for Larsen Bay, AK, ZIP 99624
The last spring frost here typically falls around 05/05, about 250 days from today. The first fall frost typically arrives around 10/03, about 151 frost-free days later.
Larsen Bay sits in USDA Zone 7b (5 to 10°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
Zone 7b around Larsen Bay has about 5 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 05/05 isn't a guarantee
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Larsen Bay compares
At roughly 151 frost-free days, Larsen Bay places 35,220 of 40,283 ZIP codes in this dataset. Within AK, it ranks 44 of 269.
Learn more
zone vs. frost date explains why Zone 7b and Larsen Bay's frost date answer different questions, and the frost range explains how to read the range around Larsen Bay's dates instead of trusting one.