Mayville, ND 58257 Frost Dates
When can you plant in Mayville, ND?
Around 05/13 is the usual last spring frost, about 258 days away. The first fall frost typically arrives around 09/27, about 136 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mayville in Zone 4a (-30 to -25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 4 weeks of growing season left in Mayville before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/13 isn't a guarantee
05/13 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mayville compares
At roughly 136 frost-free days, Mayville places 37,703 of 40,283 ZIP codes in this dataset. Within ND, it ranks 225 of 405.
Learn more
the frost range covers how to read the range around Mayville's dates instead of trusting one. local microclimates covers what one yard in Mayville can differ from the 58257 normal.