Mantador, ND 58058 Frost Dates
Frost dates for Mantador, ND, ZIP 58058
Around 05/02 is the usual last spring frost, about 247 days away. The first fall frost typically arrives around 10/06, about 157 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mantador 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 Mantador has about 6 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.
The actual range around Mantador's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mantador compares
About 157 days separate Mantador's last and first frost, putting it 33,468 of 40,283 ZIP codes nationally. Within ND, it ranks 8 of 405.
Learn more
the frost range explains how to read the range around Mantador's dates instead of trusting one, and local microclimates explains what one yard in Mantador can differ from the 58058 normal.