Willow City, ND 58384 Frost Dates
When can you plant in Willow City, ND?
Around 05/21 is the usual last spring frost, about 266 days away. The first fall frost typically arrives around 09/20, about 119 frost-free days later.
The USDA Plant Hardiness Zone Map puts Willow City 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
About 3 weeks of growing season left in Willow City before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/21 is the middle of 30 years of NOAA records, not a promise. Plant by 05/11 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 Willow City compares
Willow City's growing season runs about 119 days, ranking 39,188 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 398 of 405.
Learn more
local microclimates covers what one yard in Willow City can differ from the 58384 normal. zone vs. frost date covers why Zone 3b and Willow City's frost date answer different questions.