Wallace, ID 83873 Frost Dates
83873, near Wallace, ID: the frost window
The last spring frost here typically falls around 05/05, about 250 days from today. Fall's first freeze usually shows up around 10/02, roughly 149 days after the last spring frost.
Zone 6b (-5 to 0°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 Wallace, not a forecast for this year.
Stretching the season past the first frost
Wallace'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.
How much risk comes with planting early here
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/21 and only about 1 year in 10 sees frost after that.
Wallace against the rest of the dataset
At roughly 149 frost-free days, Wallace places 35,547 of 40,283 ZIP codes in this dataset. Within ID, it ranks 121 of 320.
Learn more
Two guides worth reading on 83873: local microclimates, on what one yard in Wallace can differ from the 83873 normal, and zone vs. frost date, on why Zone 6b and Wallace's frost date answer different questions.