Horseshoe Bend, ID 83670 Frost Dates
Horseshoe Bend, 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 09/16, roughly 108 days after the last spring frost.
Horseshoe Bend sits in USDA Zone 7a (0 to 5°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 Horseshoe Bend's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/31 isn't a guarantee
05/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/19 and only about 1 year in 10 sees frost after that.
Horseshoe Bend against the rest of the dataset
At roughly 108 frost-free days, Horseshoe Bend places 39,543 of 40,283 ZIP codes in this dataset. Within ID, it ranks 242 of 320.
Learn more
Before leaning on 83670's figures: zone vs. frost date explains why Zone 7a and Horseshoe Bend's frost date answer different questions, while the frost range explains how to read the range around Horseshoe Bend's dates instead of trusting one.