Houston, AK 99676 Frost Dates
Houston, AK: when does the frost end?
Typically, the last spring freeze lands around 05/16, roughly 261 days out. Fall's first freeze usually shows up around 09/16, roughly 122 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Houston in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 3 weeks until Houston's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/28 and only about 1 year in 10 sees frost after that.
Houston against the rest of the dataset
About 122 days separate Houston's last and first frost, putting it 38,937 of 40,283 ZIP codes nationally. Within AK, it ranks 102 of 269.
Learn more
Before leaning on 99676's figures: zone vs. frost date explains why Zone 4b and Houston's frost date answer different questions, while the frost range explains how to read the range around Houston's dates instead of trusting one.