White Bird, ID 83554 Frost Dates
White Bird, ID: when does the frost end?
The last spring frost here typically falls around 05/09, about 254 days from today. Fall's first freeze usually shows up around 10/03, roughly 146 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts White Bird in Zone 7a (0 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 White Bird's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/09 isn't a guarantee
05/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/27 and only about 1 year in 10 sees frost after that.
White Bird against the rest of the dataset
White Bird's growing season runs about 146 days, ranking 36,147 of 40,283 US ZIP codes measured here, longest to shortest. Within ID, it ranks 136 of 320.
Learn more
Before leaning on 83554's figures: zone vs. frost date explains why Zone 7a and White Bird's frost date answer different questions, while the frost range explains how to read the range around White Bird's dates instead of trusting one.