Houston, AK 99652 Frost Dates
99652, near Houston, AK: the frost window
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.
Zone 4a (-30 to -25°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
Houston's growing season runs out in roughly 1 week — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
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 39,713 of 40,283 ZIP codes in this dataset. Within AK, it ranks 195 of 269.
Learn more
Two guides worth reading on 99652: the frost range, on how to read the range around Houston's dates instead of trusting one, and local microclimates, on what one yard in Houston can differ from the 99652 normal.