Hagerman, ID 83332 Frost Dates
Hagerman, ID: when does the frost end?
Around 05/03 is the usual last spring frost, about 248 days away. Fall's first freeze usually shows up around 10/01, roughly 151 days after the last spring frost.
Hagerman 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 5 weeks until Hagerman'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
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Hagerman against the rest of the dataset
Hagerman's growing season runs about 151 days, ranking 35,095 of 40,283 US ZIP codes measured here, longest to shortest. Within ID, it ranks 107 of 320.
Learn more
Before leaning on 83332's figures: zone vs. frost date explains why Zone 7a and Hagerman's frost date answer different questions, while the frost range explains how to read the range around Hagerman's dates instead of trusting one.