Sykeston, ND 58486 Frost Dates
Sykeston, ND: when does the frost end?
Around 05/10 is the usual last spring frost, about 255 days away. Fall's first freeze usually shows up around 09/28, roughly 139 days after the last spring frost.
Sykeston 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 4 weeks until Sykeston's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/10 isn't a guarantee
05/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/23 and only about 1 year in 10 sees frost after that.
Sykeston against the rest of the dataset
Sykeston's growing season runs about 139 days, ranking 37,300 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 158 of 405.
Learn more
Before leaning on 58486's figures: the frost range explains how to read the range around Sykeston's dates instead of trusting one, while local microclimates explains what one yard in Sykeston can differ from the 58486 normal.