Priest River, ID 83856 Frost Dates
Priest River, ID: when does the frost end?
Around 05/20 is the usual last spring frost, about 265 days away. Fall's first freeze usually shows up around 09/13, roughly 114 days after the last spring frost.
Zone 6a (-10 to -5°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 Priest River, not a forecast for this year.
Stretching the season past the first frost
With roughly 2 weeks until Priest River'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
05/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/04 and only about 1 year in 10 sees frost after that.
Priest River against the rest of the dataset
About 114 days separate Priest River's last and first frost, putting it 39,360 of 40,283 ZIP codes nationally. Within ID, it ranks 233 of 320.
Learn more
Before leaning on 83856's figures: zone vs. frost date explains why Zone 6a and Priest River's frost date answer different questions, while the frost range explains how to read the range around Priest River's dates instead of trusting one.