Athol, ID 83801 Frost Dates
Athol, ID: when does the frost end?
Around 05/22 is the usual last spring frost, about 267 days away. Fall's first freeze usually shows up around 09/22, roughly 122 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Athol in Zone 6b (-5 to 0°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
With roughly 4 weeks until Athol's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Athol's last frost
05/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/06 and only about 1 year in 10 sees frost after that.
Athol against the rest of the dataset
At roughly 122 frost-free days, Athol places 38,956 of 40,283 ZIP codes in this dataset. Within ID, it ranks 200 of 320.
Learn more
Before leaning on 83801's figures: local microclimates explains what one yard in Athol can differ from the 83801 normal, while zone vs. frost date explains why Zone 6b and Athol's frost date answer different questions.