Valdez, AK 99677 Frost Dates
Frost dates for Valdez, AK, ZIP 99677
Typically, the last spring freeze lands around 05/14, roughly 259 days out. The first fall frost typically arrives around 09/22, about 129 frost-free days later.
The USDA Plant Hardiness Zone Map puts Valdez in Zone 8a (10 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
Zone 8a around Valdez has about 4 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.
How much risk comes with planting early here
05/14 is the middle of 30 years of NOAA records, not a promise. Plant by 05/02 and you're betting against frost in roughly 9 years out of 10. 05/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Valdez compares
At roughly 129 frost-free days, Valdez places 38,459 of 40,283 ZIP codes in this dataset. Within AK, it ranks 78 of 269.
Learn more
local microclimates explains what one yard in Valdez can differ from the 99677 normal, and zone vs. frost date explains why Zone 8a and Valdez's frost date answer different questions.