Aberdeen, ID 83210 Frost Dates
Aberdeen, ID: when does the frost end?
Around 05/21 is the usual last spring frost, about 266 days away. Fall's first freeze usually shows up around 09/20, roughly 118 days after the last spring frost.
Aberdeen sits in USDA Zone 5b (-15 to -10°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 Aberdeen's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/21 isn't a guarantee
05/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/13 and only about 1 year in 10 sees frost after that.
Aberdeen against the rest of the dataset
Aberdeen's growing season runs about 118 days, ranking 39,207 of 40,283 US ZIP codes measured here, longest to shortest. Within ID, it ranks 225 of 320.
Learn more
Before leaning on 83210's figures: the frost range explains how to read the range around Aberdeen's dates instead of trusting one, while local microclimates explains what one yard in Aberdeen can differ from the 83210 normal.