Forest River, ND 58233 Frost Dates
58233, near Forest River, ND: the frost window
The last spring frost here typically falls around 05/04, about 249 days from today. Fall's first freeze usually shows up around 10/07, roughly 156 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Forest River in Zone 4a (-30 to -25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Forest River's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/04 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 05/18 and only about 1 year in 10 sees frost after that.
Forest River against the rest of the dataset
At roughly 156 frost-free days, Forest River places 33,877 of 40,283 ZIP codes in this dataset. Within ND, it ranks 17 of 405.
Learn more
Two guides worth reading on 58233: zone vs. frost date, on why Zone 4a and Forest River's frost date answer different questions, and the frost range, on how to read the range around Forest River's dates instead of trusting one.