Cambridge, ID 83610 Frost Dates
83610, near Cambridge, ID: the frost window
Typically, the last spring freeze lands around 05/10, roughly 255 days out. Fall's first freeze usually shows up around 10/02, roughly 145 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Cambridge in Zone 7a (0 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
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
About 145 days separate Cambridge's last and first frost, putting it 36,270 of 40,283 ZIP codes nationally. Within ID, it ranks 139 of 320.
Learn more
Two guides worth reading on 83610: the frost range, on how to read the range around Cambridge's dates instead of trusting one, and local microclimates, on what one yard in Cambridge can differ from the 83610 normal.