Reile's Acres, ND 58105 Frost Dates
Frost dates for Reile's Acres, ND, ZIP 58105
Around 05/10 is the usual last spring frost, about 255 days away. The first fall frost typically arrives around 09/30, about 143 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 Reile's Acres, not a forecast for this year.
What to do before the first frost
Zone 4a around Reile's Acres has about 5 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.
Why 05/10 isn't a guarantee
05/10 is the middle of 30 years of NOAA records, not a promise. Plant by 04/27 and you're betting against frost in roughly 9 years out of 10. 05/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Reile's Acres compares
Reile's Acres's growing season runs about 143 days, ranking 36,567 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 89 of 405.
Learn more
local microclimates explains what one yard in Reile's Acres can differ from the 58105 normal, and zone vs. frost date explains why Zone 4a and Reile's Acres's frost date answer different questions.