Bena, MN 56626 Frost Dates
Frost dates for Bena, MN, ZIP 56626
Around 05/08 is the usual last spring frost, about 253 days away. The first fall frost typically arrives around 10/01, about 144 frost-free days later.
Zone 3b (-35 to -30°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 Bena, not a forecast for this year.
What to do before the first frost
Zone 3b around Bena 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.
How much risk comes with planting early here
05/08 is the middle of 30 years of NOAA records, not a promise. Plant by 04/28 and you're betting against frost in roughly 9 years out of 10. 05/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bena compares
At roughly 144 frost-free days, Bena places 36,470 of 40,283 ZIP codes in this dataset. Within MN, it ranks 673 of 943.
Learn more
local microclimates explains what one yard in Bena can differ from the 56626 normal, and zone vs. frost date explains why Zone 3b and Bena's frost date answer different questions.