Balfour, ND 58712 Frost Dates
Frost dates for Balfour, ND, ZIP 58712
Typically, the last spring freeze lands around 05/12, roughly 257 days out. The first fall frost typically arrives around 09/27, about 137 frost-free days later.
Balfour sits in USDA Zone 4a (-30 to -25°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 4a around Balfour 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.
The actual range around Balfour's last frost
05/12 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. 05/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Balfour compares
About 137 days separate Balfour's last and first frost, putting it 37,609 of 40,283 ZIP codes nationally. Within ND, it ranks 220 of 405.
Learn more
the frost range explains how to read the range around Balfour's dates instead of trusting one, and local microclimates explains what one yard in Balfour can differ from the 58712 normal.