Ihlen, MN 56140 Frost Dates
Ihlen, MN: when does the frost end?
The last spring frost here typically falls around 05/04, about 249 days from today. Fall's first freeze usually shows up around 10/02, roughly 152 days after the last spring frost.
Ihlen sits in USDA Zone 4b (-25 to -20°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 5 weeks until Ihlen's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Ihlen's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Ihlen against the rest of the dataset
At roughly 152 frost-free days, Ihlen places 34,925 of 40,283 ZIP codes in this dataset. Within MN, it ranks 480 of 943.
Learn more
Before leaning on 56140's figures: local microclimates explains what one yard in Ihlen can differ from the 56140 normal, while zone vs. frost date explains why Zone 4b and Ihlen's frost date answer different questions.