Regan, ND 58477 Frost Dates
When can you plant in Regan, ND?
Around 05/11 is the usual last spring frost, about 256 days away. The first fall frost typically arrives around 09/30, about 142 frost-free days later.
Zone 4a (-30 to -25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Regan, not a forecast for this year.
What to do before the first frost
About 5 weeks of growing season left in Regan before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/11 isn't a guarantee
05/11 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 Regan compares
At roughly 142 frost-free days, Regan places 36,853 of 40,283 ZIP codes in this dataset. Within ND, it ranks 112 of 405.
Learn more
the frost range covers how to read the range around Regan's dates instead of trusting one. local microclimates covers what one yard in Regan can differ from the 58477 normal.