Grand Rapids, MN 55744 Frost Dates
When can you plant in Grand Rapids, MN?
Typically, the last spring freeze lands around 05/17, roughly 262 days out. The first fall frost typically arrives around 09/24, about 130 frost-free days later.
Zone 4a (-30 to -25°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 Grand Rapids, not a forecast for this year.
What to do before the first frost
About 4 weeks of growing season left in Grand Rapids before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/17 is the middle of 30 years of NOAA records, not a promise. Plant by 05/03 and you're betting against frost in roughly 9 years out of 10. 05/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Grand Rapids compares
Grand Rapids's growing season runs about 130 days, ranking 38,365 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 842 of 943.
Learn more
the frost range covers how to read the range around Grand Rapids's dates instead of trusting one. local microclimates covers what one yard in Grand Rapids can differ from the 55744 normal.