Biwabik, MN 55777 Frost Dates
55777, near Biwabik, MN: the frost window
The NOAA station nearest to 55777 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 3b (-35 to -30°F average annual minimum).
Biwabik against the rest of the dataset
Biwabik's growing season runs about 83 days, ranking 40,022 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 939 of 943.
Learn more
Two guides worth reading on 55777: local microclimates, on what one yard in Biwabik can differ from the 55777 normal, and the methodology, on exactly which NOAA and USDA figures feed 55777's numbers.