Mylo, ND 58310 Frost Dates
Frost dates for Mylo, ND, ZIP 58310
Around 05/22 is the usual last spring frost, about 267 days away. The first fall frost typically arrives around 09/20, about 120 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mylo in Zone 3b (-35 to -30°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 3b around Mylo has about 3 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
05/22 is the middle of 30 years of NOAA records, not a promise. Plant by 05/10 and you're betting against frost in roughly 9 years out of 10. 06/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mylo compares
At roughly 120 frost-free days, Mylo places 39,122 of 40,283 ZIP codes in this dataset. Within ND, it ranks 394 of 405.
Learn more
zone vs. frost date explains why Zone 3b and Mylo's frost date answer different questions, and the frost range explains how to read the range around Mylo's dates instead of trusting one.