Ketchikan, AK 99901 Frost Dates
When can you plant in Ketchikan, AK?
The last spring frost here typically falls around 04/04, about 219 days from today. The first fall frost typically arrives around 11/09, about 218 frost-free days later.
Zone 7b (5 to 10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Ketchikan, not a forecast for this year.
What to do before the first frost
About 10 weeks of growing season left in Ketchikan before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/04 isn't a guarantee
04/04 is the middle of 30 years of NOAA records, not a promise. Plant by 03/15 and you're betting against frost in roughly 9 years out of 10. 04/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ketchikan compares
At roughly 218 frost-free days, Ketchikan places 13,252 of 40,283 ZIP codes in this dataset. Within AK, it ranks 1 of 269.
Learn more
the frost range covers how to read the range around Ketchikan's dates instead of trusting one. local microclimates covers what one yard in Ketchikan can differ from the 99901 normal.