Sanborn, MN 56083 Frost Dates
Frost dates for Sanborn, MN, ZIP 56083
The last spring frost here typically falls around 05/04, about 249 days from today. The first fall frost typically arrives around 10/01, about 150 frost-free days later.
Sanborn sits in USDA Zone 5a (-20 to -15°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 5a around Sanborn 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
05/04 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 Sanborn compares
Sanborn's growing season runs about 150 days, ranking 35,398 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 537 of 943.
Learn more
the frost range explains how to read the range around Sanborn's dates instead of trusting one, and local microclimates explains what one yard in Sanborn can differ from the 56083 normal.