Birchwood, WI 54817 Frost Dates
Frost dates for Birchwood, WI, ZIP 54817
The NOAA station nearest to 54817 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).
How Birchwood compares
About 100 days separate Birchwood's last and first frost, putting it 39,720 of 40,283 ZIP codes nationally. Within WI, it ranks 855 of 860.
Learn more
zone vs. frost date explains why Zone 4a and Birchwood's frost date answer different questions, and local microclimates explains what one yard in Birchwood can differ from the 54817 normal.