Houston, AK 99694 Frost Dates
Houston, AK: when does the frost end?
Around 05/29 is the usual last spring frost, about 274 days away. Fall's first freeze usually shows up around 09/07, roughly 100 days after the last spring frost.
Houston sits in USDA Zone 4a (-30 to -25°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.
Stretching the season past the first frost
With roughly 1 week until Houston's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Houston's last frost
05/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/09 and only about 1 year in 10 sees frost after that.
Houston against the rest of the dataset
At roughly 100 frost-free days, Houston places 39,715 of 40,283 ZIP codes in this dataset. Within AK, it ranks 197 of 269.
Learn more
Before leaning on 99694's figures: the frost range explains how to read the range around Houston's dates instead of trusting one, while local microclimates explains what one yard in Houston can differ from the 99694 normal.