Lehr, ND 58460 Frost Dates
Frost dates for Lehr, ND, ZIP 58460
The last spring frost here typically falls around 05/13, about 258 days from today. The first fall frost typically arrives around 09/27, about 135 frost-free days later.
The USDA Plant Hardiness Zone Map puts Lehr in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 4b around Lehr has about 4 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
05/13 is the middle of 30 years of NOAA records, not a promise. Plant by 05/02 and you're betting against frost in roughly 9 years out of 10. 05/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lehr compares
About 135 days separate Lehr's last and first frost, putting it 37,935 of 40,283 ZIP codes nationally. Within ND, it ranks 267 of 405.
Learn more
zone vs. frost date explains why Zone 4b and Lehr's frost date answer different questions, and the frost range explains how to read the range around Lehr's dates instead of trusting one.