Finley, ND 58230 Frost Dates
58230, near Finley, ND: the frost window
The last spring frost here typically falls around 05/13, about 258 days from today. Fall's first freeze usually shows up around 09/27, roughly 136 days after the last spring frost.
Finley 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
Finley'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.
How much risk comes with planting early here
05/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 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.
Finley against the rest of the dataset
Finley's growing season runs about 136 days, ranking 37,776 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 235 of 405.
Learn more
Two guides worth reading on 58230: the frost range, on how to read the range around Finley's dates instead of trusting one, and local microclimates, on what one yard in Finley can differ from the 58230 normal.