Fort Yates, ND 58538 Frost Dates
58538, near Fort Yates, ND: the frost window
Typically, the last spring freeze lands around 05/12, roughly 257 days out. Fall's first freeze usually shows up around 09/28, roughly 137 days after the last spring frost.
Fort Yates 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.
Stretching the season past the first frost
Fort Yates's growing season runs out in roughly 4 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Fort Yates's last frost
05/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/25 and only about 1 year in 10 sees frost after that.
Fort Yates against the rest of the dataset
About 137 days separate Fort Yates's last and first frost, putting it 37,590 of 40,283 ZIP codes nationally. Within ND, it ranks 216 of 405.
Learn more
Two guides worth reading on 58538: the frost range, on how to read the range around Fort Yates's dates instead of trusting one, and local microclimates, on what one yard in Fort Yates can differ from the 58538 normal.