Ogilvie, MN 56358 Frost Dates
56358, near Ogilvie, MN: the frost window
The last spring frost here typically falls around 05/09, about 254 days from today. Fall's first freeze usually shows up around 09/30, roughly 142 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 Ogilvie, not a forecast for this year.
Stretching the season past the first frost
Ogilvie'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.
The actual range around Ogilvie's last frost
05/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/26 and only about 1 year in 10 sees frost after that.
Ogilvie against the rest of the dataset
About 142 days separate Ogilvie's last and first frost, putting it 36,808 of 40,283 ZIP codes nationally. Within MN, it ranks 695 of 943.
Learn more
Two guides worth reading on 56358: local microclimates, on what one yard in Ogilvie can differ from the 56358 normal, and zone vs. frost date, on why Zone 4a and Ogilvie's frost date answer different questions.