McCall, ID 83638 Frost Dates
83638, near McCall, ID: the frost window
Typically, the last spring freeze lands around 06/10, roughly 286 days out. Fall's first freeze usually shows up around 09/10, roughly 93 days after the last spring frost.
McCall sits in USDA Zone 5a (-20 to -15°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
McCall's growing season runs out in roughly 2 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
06/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/28 and only about 1 year in 10 sees frost after that.
McCall against the rest of the dataset
McCall's growing season runs about 93 days, ranking 39,869 of 40,283 US ZIP codes measured here, longest to shortest. Within ID, it ranks 263 of 320.
Learn more
Two guides worth reading on 83638: the frost range, on how to read the range around McCall's dates instead of trusting one, and local microclimates, on what one yard in McCall can differ from the 83638 normal.