Houston, AK 99683 Frost Dates
Houston, AK: when does the frost end?
The last spring frost here typically falls around 05/16, about 261 days from today. Fall's first freeze usually shows up around 09/16, roughly 122 days after the last spring frost.
Zone 4b (-25 to -20°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.
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
At roughly 122 frost-free days, Houston places 38,938 of 40,283 ZIP codes in this dataset. Within AK, it ranks 103 of 269.
Learn more
Before leaning on 99683's figures: local microclimates explains what one yard in Houston can differ from the 99683 normal, while zone vs. frost date explains why Zone 4b and Houston's frost date answer different questions.