Mountain Home, ID 83647 Frost Dates
When can you plant in Mountain Home, ID?
The last spring frost here typically falls around 05/02, about 247 days from today. The first fall frost typically arrives around 10/08, about 157 frost-free days later.
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 Mountain Home, not a forecast for this year.
What to do before the first frost
About 6 weeks of growing season left in Mountain Home before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/18 and you're betting against frost in roughly 9 years out of 10. 05/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mountain Home compares
Mountain Home's growing season runs about 157 days, ranking 33,253 of 40,283 US ZIP codes measured here, longest to shortest. Within ID, it ranks 86 of 320.
Learn more
the frost range covers how to read the range around Mountain Home's dates instead of trusting one. local microclimates covers what one yard in Mountain Home can differ from the 83647 normal.