Park River, ND 58270 Frost Dates
Park River, ND: when does the frost end?
Typically, the last spring freeze lands around 05/04, roughly 249 days out. Fall's first freeze usually shows up around 10/07, roughly 156 days after the last spring frost.
Park River 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
With roughly 6 weeks until Park River's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
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.
Park River against the rest of the dataset
Park River's growing season runs about 156 days, ranking 33,691 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 11 of 405.
Learn more
Before leaning on 58270's figures: zone vs. frost date explains why Zone 4a and Park River's frost date answer different questions, while the frost range explains how to read the range around Park River's dates instead of trusting one.