Fort Ransom, ND 58033 Frost Dates
58033, near Fort Ransom, ND: the frost window
The last spring frost here typically falls around 05/03, about 248 days from today. Fall's first freeze usually shows up around 10/05, roughly 155 days after the last spring frost.
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 Fort Ransom, not a forecast for this year.
Stretching the season past the first frost
Fort Ransom's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/03 isn't a guarantee
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/16 and only about 1 year in 10 sees frost after that.
Fort Ransom against the rest of the dataset
Fort Ransom's growing season runs about 155 days, ranking 34,182 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 21 of 405.
Learn more
Two guides worth reading on 58033: local microclimates, on what one yard in Fort Ransom can differ from the 58033 normal, and zone vs. frost date, on why Zone 4a and Fort Ransom's frost date answer different questions.