Downey, ID 83234 Frost Dates
Downey, ID: when does the frost end?
The last spring frost here typically falls around 05/31, about 276 days from today. Fall's first freeze usually shows up around 09/18, roughly 110 days after the last spring frost.
Zone 6b (-5 to 0°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 Downey, not a forecast for this year.
Stretching the season past the first frost
With roughly 3 weeks until Downey'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
05/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/16 and only about 1 year in 10 sees frost after that.
Downey against the rest of the dataset
Downey's growing season runs about 110 days, ranking 39,512 of 40,283 US ZIP codes measured here, longest to shortest. Within ID, it ranks 239 of 320.
Learn more
Before leaning on 83234's figures: the frost range explains how to read the range around Downey's dates instead of trusting one, while local microclimates explains what one yard in Downey can differ from the 83234 normal.