Robinson, ND 58478 Frost Dates
When can you plant in Robinson, ND?
The last spring frost here typically falls around 05/13, about 258 days from today. The first fall frost typically arrives around 09/29, about 139 frost-free days later.
The USDA Plant Hardiness Zone Map puts Robinson 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 5 weeks of growing season left in Robinson 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 05/01 and you're betting against frost in roughly 9 years out of 10. 05/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Robinson compares
Robinson's growing season runs about 139 days, ranking 37,330 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 179 of 405.
Learn more
local microclimates covers what one yard in Robinson can differ from the 58478 normal. zone vs. frost date covers why Zone 4a and Robinson's frost date answer different questions.