Biwabik, MN 55814 Frost Dates
Biwabik, MN: when does the frost end?
The NOAA station nearest to 55814 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 4b (-25 to -20°F average annual minimum).
Biwabik against the rest of the dataset
Biwabik's growing season runs about 83 days, ranking 40,024 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 941 of 943.
Learn more
Before leaning on 55814's figures: zone vs. frost date explains why Zone 4b and Biwabik's frost date answer different questions, while local microclimates explains what one yard in Biwabik can differ from the 55814 normal.