Butte-Silver Bow, MT 59762 Frost Dates
59762, near Butte-Silver Bow, MT: the frost window
The NOAA station nearest to 59762 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).
Butte-Silver Bow against the rest of the dataset
About 27 days separate Butte-Silver Bow's last and first frost, putting it 40,270 of 40,283 ZIP codes nationally. Within MT, it ranks 391 of 392.
Learn more
Two guides worth reading on 59762: zone vs. frost date, on why Zone 5a and Butte-Silver Bow's frost date answer different questions, and local microclimates, on what one yard in Butte-Silver Bow can differ from the 59762 normal.