Haines, OR 97833 Frost Dates
97833, near Haines, OR: the frost window
Typically, the last spring freeze lands around 05/25, roughly 270 days out. Fall's first freeze usually shows up around 09/15, roughly 111 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Haines in Zone 6a (-10 to -5°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
Haines's growing season runs out in roughly 3 weeks — 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
05/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/16 and only about 1 year in 10 sees frost after that.
Haines against the rest of the dataset
At roughly 111 frost-free days, Haines places 39,475 of 40,283 ZIP codes in this dataset. Within OR, it ranks 402 of 463.
Learn more
Two guides worth reading on 97833: local microclimates, on what one yard in Haines can differ from the 97833 normal, and zone vs. frost date, on why Zone 6a and Haines's frost date answer different questions.