Solen, ND 58570 Frost Dates
Frost dates for Solen, ND, ZIP 58570
Typically, the last spring freeze lands around 05/12, roughly 257 days out. The first fall frost typically arrives around 09/24, about 134 frost-free days later.
The USDA Plant Hardiness Zone Map puts Solen in Zone 4a (-30 to -25°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 4a around Solen 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. 05/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Solen compares
Solen's growing season runs about 134 days, ranking 38,034 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 273 of 405.
Learn more
zone vs. frost date explains why Zone 4a and Solen's frost date answer different questions, and the frost range explains how to read the range around Solen's dates instead of trusting one.