Martin, ND 58758 Frost Dates
Frost dates for Martin, ND, ZIP 58758
The last spring frost here typically falls around 05/12, about 257 days from today. The first fall frost typically arrives around 09/26, about 135 frost-free days later.
Zone 4a (-30 to -25°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 Martin, not a forecast for this year.
What to do before the first frost
Zone 4a around Martin 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
05/12 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Martin compares
Martin's growing season runs about 135 days, ranking 37,937 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 269 of 405.
Learn more
zone vs. frost date explains why Zone 4a and Martin's frost date answer different questions, and the frost range explains how to read the range around Martin's dates instead of trusting one.