Cambridge, ID 83632 Frost Dates
83632, near Cambridge, ID: the frost window
Around 05/10 is the usual last spring frost, about 255 days away. Fall's first freeze usually shows up around 10/02, roughly 145 days after the last spring frost.
Cambridge sits in USDA Zone 6a (-10 to -5°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
Cambridge's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/10 isn't a guarantee
05/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/01 and only about 1 year in 10 sees frost after that.
Cambridge against the rest of the dataset
Cambridge's growing season runs about 145 days, ranking 36,271 of 40,283 US ZIP codes measured here, longest to shortest. Within ID, it ranks 140 of 320.
Learn more
Two guides worth reading on 83632: local microclimates, on what one yard in Cambridge can differ from the 83632 normal, and zone vs. frost date, on why Zone 6a and Cambridge's frost date answer different questions.