Mott, ND 58646 Frost Dates
Mott, ND: when does the frost end?
The last spring frost here typically falls around 05/16, about 261 days from today. Fall's first freeze usually shows up around 09/25, roughly 129 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Mott in Zone 4a (-30 to -25°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 4 weeks until Mott's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/16 isn't a guarantee
05/16 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 05/30 and only about 1 year in 10 sees frost after that.
Mott against the rest of the dataset
At roughly 129 frost-free days, Mott places 38,479 of 40,283 ZIP codes in this dataset. Within ND, it ranks 312 of 405.
Learn more
Before leaning on 58646's figures: zone vs. frost date explains why Zone 4a and Mott's frost date answer different questions, while the frost range explains how to read the range around Mott's dates instead of trusting one.