Athol, ID 83809 Frost Dates
Athol, ID: when does the frost end?
The last spring frost here typically falls around 05/22, about 267 days from today. Fall's first freeze usually shows up around 09/22, roughly 122 days after the last spring frost.
Athol sits in USDA Zone 6b (-5 to 0°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
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.
How much risk comes with planting early here
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
Athol's growing season runs about 122 days, ranking 38,958 of 40,283 US ZIP codes measured here, longest to shortest. Within ID, it ranks 202 of 320.
Learn more
Before leaning on 83809's figures: zone vs. frost date explains why Zone 6b and Athol's frost date answer different questions, while the frost range explains how to read the range around Athol's dates instead of trusting one.