Chubbuck, ID 83202 Frost Dates
83202, near Chubbuck, ID: the frost window
The last spring frost here typically falls around 05/20, about 265 days from today. Fall's first freeze usually shows up around 09/20, roughly 119 days after the last spring frost.
Zone 6a (-10 to -5°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 Chubbuck, not a forecast for this year.
Stretching the season past the first frost
Chubbuck'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.
Why 05/20 isn't a guarantee
05/20 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 06/12 and only about 1 year in 10 sees frost after that.
Chubbuck against the rest of the dataset
Chubbuck's growing season runs about 119 days, ranking 39,131 of 40,283 US ZIP codes measured here, longest to shortest. Within ID, it ranks 216 of 320.
Learn more
Two guides worth reading on 83202: the frost range, on how to read the range around Chubbuck's dates instead of trusting one, and local microclimates, on what one yard in Chubbuck can differ from the 83202 normal.