Biwabik, MN 55791 Frost Dates
55791, near Biwabik, MN: the frost window
The NOAA station nearest to 55791 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 4a (-30 to -25°F average annual minimum).
Biwabik against the rest of the dataset
About 83 days separate Biwabik's last and first frost, putting it 40,023 of 40,283 ZIP codes nationally. Within MN, it ranks 940 of 943.
Learn more
Two guides worth reading on 55791: local microclimates, on what one yard in Biwabik can differ from the 55791 normal, and the methodology, on exactly which NOAA and USDA figures feed 55791's numbers.