Lake Benton, MN 56149 Frost Dates
Frost dates for Lake Benton, MN, ZIP 56149
The last spring frost here typically falls around 05/04, about 249 days from today. The first fall frost typically arrives around 10/02, about 152 frost-free days later.
Lake Benton sits in USDA Zone 4b (-25 to -20°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 4b around Lake Benton has about 5 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 Lake Benton's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 and you're betting against frost in roughly 9 years out of 10. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lake Benton compares
About 152 days separate Lake Benton's last and first frost, putting it 34,845 of 40,283 ZIP codes nationally. Within MN, it ranks 459 of 943.
Learn more
the frost range explains how to read the range around Lake Benton's dates instead of trusting one, and local microclimates explains what one yard in Lake Benton can differ from the 56149 normal.