Priest River, ID 83841 Frost Dates
Priest River, ID: when does the frost end?
The last spring frost here typically falls around 05/12, about 257 days from today. Fall's first freeze usually shows up around 09/21, roughly 130 days after the last spring frost.
Priest River 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 3 weeks until Priest River's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/12 isn't a guarantee
05/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/29 and only about 1 year in 10 sees frost after that.
Priest River against the rest of the dataset
About 130 days separate Priest River's last and first frost, putting it 38,384 of 40,283 ZIP codes nationally. Within ID, it ranks 181 of 320.
Learn more
Before leaning on 83841's figures: local microclimates explains what one yard in Priest River can differ from the 83841 normal, while zone vs. frost date explains why Zone 6b and Priest River's frost date answer different questions.