Dickinson, ND 58601 Frost Dates
When can you plant in Dickinson, ND?
Around 05/20 is the usual last spring frost, about 265 days away. The first fall frost typically arrives around 09/22, about 123 frost-free days later.
The USDA Plant Hardiness Zone Map puts Dickinson in Zone 4b (-25 to -20°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 Dickinson before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/20 isn't a guarantee
05/20 is the middle of 30 years of NOAA records, not a promise. Plant by 05/08 and you're betting against frost in roughly 9 years out of 10. 06/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Dickinson compares
Dickinson's growing season runs about 123 days, ranking 38,882 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 373 of 405.
Learn more
the frost range covers how to read the range around Dickinson's dates instead of trusting one. local microclimates covers what one yard in Dickinson can differ from the 58601 normal.