Delta Junction, AK 99586 Frost Dates
Frost dates for Delta Junction, AK, ZIP 99586
Typically, the last spring freeze lands around 06/05, roughly 281 days out. The first fall frost typically arrives around 08/24, about 76 frost-free days later.
Delta Junction sits in USDA Zone 2b (-45 to -40°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 last frost
Zone 2b gardeners near Delta Junction have about 40 weeks left before the last frost — cover tender transplants on any night that dips close to freezing.
Why 06/05 isn't a guarantee
06/05 is the middle of 30 years of NOAA records, not a promise. Plant by 05/27 and you're betting against frost in roughly 9 years out of 10. 06/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Delta Junction compares
About 76 days separate Delta Junction's last and first frost, putting it 40,086 of 40,283 ZIP codes nationally. Within AK, it ranks 246 of 269.
Learn more
zone vs. frost date explains why Zone 2b and Delta Junction's frost date answer different questions, and the frost range explains how to read the range around Delta Junction's dates instead of trusting one.