Amenia, ND 58004 Frost Dates
Frost dates for Amenia, ND, ZIP 58004
Around 05/09 is the usual last spring frost, about 254 days away. The first fall frost typically arrives around 10/01, about 143 frost-free days later.
Amenia sits in USDA Zone 4a (-30 to -25°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 4a around Amenia 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 05/09 isn't a guarantee
05/09 is the middle of 30 years of NOAA records, not a promise. Plant by 04/25 and you're betting against frost in roughly 9 years out of 10. 05/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Amenia compares
About 143 days separate Amenia's last and first frost, putting it 36,673 of 40,283 ZIP codes nationally. Within ND, it ranks 99 of 405.
Learn more
zone vs. frost date explains why Zone 4a and Amenia's frost date answer different questions, and the frost range explains how to read the range around Amenia's dates instead of trusting one.