St. Paul, AK 99660 Frost Dates
When can you plant in St. Paul, AK?
Typically, the last spring freeze lands around 06/04, roughly 280 days out. The first fall frost typically arrives around 09/28, about 114 frost-free days later.
St. Paul sits in USDA Zone 6b (-5 to 0°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 4 weeks of growing season left in St. Paul before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
06/04 is the middle of 30 years of NOAA records, not a promise. Plant by 05/16 and you're betting against frost in roughly 9 years out of 10. 06/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. Paul compares
At roughly 114 frost-free days, St. Paul places 39,368 of 40,283 ZIP codes in this dataset. Within AK, it ranks 146 of 269.
Learn more
the frost range covers how to read the range around St. Paul's dates instead of trusting one. local microclimates covers what one yard in St. Paul can differ from the 99660 normal.