Rexburg, ID 83460 Frost Dates
Rexburg, ID: when does the frost end?
Around 05/12 is the usual last spring frost, about 257 days away. Fall's first freeze usually shows up around 09/24, roughly 132 days after the last spring frost.
Zone 5a (-20 to -15°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 Rexburg, not a forecast for this year.
Stretching the season past the first frost
With roughly 4 weeks until Rexburg's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Rexburg's last frost
05/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/02 and only about 1 year in 10 sees frost after that.
Rexburg against the rest of the dataset
At roughly 132 frost-free days, Rexburg places 38,162 of 40,283 ZIP codes in this dataset. Within ID, it ranks 167 of 320.
Learn more
Before leaning on 83460's figures: zone vs. frost date explains why Zone 5a and Rexburg's frost date answer different questions, while the frost range explains how to read the range around Rexburg's dates instead of trusting one.