Bottineau, ND 58318 Frost Dates
Frost dates for Bottineau, ND, ZIP 58318
Around 05/17 is the usual last spring frost, about 262 days away. The first fall frost typically arrives around 09/24, about 130 frost-free days later.
The USDA Plant Hardiness Zone Map puts Bottineau in Zone 3b (-35 to -30°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
Zone 3b around Bottineau has about 4 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Bottineau's last frost
05/17 is the middle of 30 years of NOAA records, not a promise. Plant by 05/04 and you're betting against frost in roughly 9 years out of 10. 05/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bottineau compares
At roughly 130 frost-free days, Bottineau places 38,380 of 40,283 ZIP codes in this dataset. Within ND, it ranks 306 of 405.
Learn more
local microclimates explains what one yard in Bottineau can differ from the 58318 normal, and zone vs. frost date explains why Zone 3b and Bottineau's frost date answer different questions.