Columbus, ND 58727 Frost Dates
Columbus, ND: when does the frost end?
Typically, the last spring freeze lands around 05/18, roughly 263 days out. Fall's first freeze usually shows up around 09/17, roughly 119 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Columbus in Zone 3b (-35 to -30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 3 weeks until Columbus's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/01 and only about 1 year in 10 sees frost after that.
Columbus against the rest of the dataset
Columbus's growing season runs about 119 days, ranking 39,190 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 400 of 405.
Learn more
Before leaning on 58727's figures: zone vs. frost date explains why Zone 3b and Columbus's frost date answer different questions, while the frost range explains how to read the range around Columbus's dates instead of trusting one.