Biwabik, MN 55816 Frost Dates
55816, near Biwabik, MN: the frost window
The NOAA station nearest to 55816 does not report a usable frost-date normal for either event, so no last-frost or first-frost figure is shown here. The USDA hardiness zone below is still real: Zone 5a (-20 to -15°F average annual minimum).
Biwabik against the rest of the dataset
At roughly 83 frost-free days, Biwabik places 40,026 of 40,283 ZIP codes in this dataset. Within MN, it ranks 943 of 943.
Learn more
Two guides worth reading on 55816: zone vs. frost date, on why Zone 5a and Biwabik's frost date answer different questions, and local microclimates, on what one yard in Biwabik can differ from the 55816 normal.