Ruthton, MN 56170 Frost Dates
When can you plant in Ruthton, MN?
Around 05/07 is the usual last spring frost, about 252 days away. The first fall frost typically arrives around 09/29, about 145 frost-free days later.
Ruthton 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
About 5 weeks of growing season left in Ruthton 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
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/25 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 Ruthton compares
At roughly 145 frost-free days, Ruthton places 36,287 of 40,283 ZIP codes in this dataset. Within MN, it ranks 637 of 943.
Learn more
zone vs. frost date covers why Zone 4b and Ruthton's frost date answer different questions. the frost range covers how to read the range around Ruthton's dates instead of trusting one.