Bonners Ferry, ID 83805 Frost Dates
Bonners Ferry, ID: when does the frost end?
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/04, roughly 154 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Bonners Ferry in Zone 6a (-10 to -5°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 5 weeks until Bonners Ferry'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
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/16 and only about 1 year in 10 sees frost after that.
Bonners Ferry against the rest of the dataset
At roughly 154 frost-free days, Bonners Ferry places 34,328 of 40,283 ZIP codes in this dataset. Within ID, it ranks 98 of 320.
Learn more
Before leaning on 83805's figures: local microclimates explains what one yard in Bonners Ferry can differ from the 83805 normal, while zone vs. frost date explains why Zone 6a and Bonners Ferry's frost date answer different questions.