Houston, AK 99688 Frost Dates
When can you plant in Houston, AK?
Typically, the last spring freeze lands around 05/29, roughly 274 days out. The first fall frost typically arrives around 09/07, about 100 frost-free days later.
Zone 3b (-35 to -30°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 Houston, not a forecast for this year.
What to do before the first frost
About 1 week of growing season left in Houston 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
05/29 is the middle of 30 years of NOAA records, not a promise. Plant by 05/13 and you're betting against frost in roughly 9 years out of 10. 06/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Houston compares
At roughly 100 frost-free days, Houston places 39,714 of 40,283 ZIP codes in this dataset. Within AK, it ranks 196 of 269.
Learn more
zone vs. frost date covers why Zone 3b and Houston's frost date answer different questions. the frost range covers how to read the range around Houston's dates instead of trusting one.