Drummond, MT 59639 Frost Dates
59639, near Drummond, MT: the frost window
The NOAA station nearest to 59639 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).
Drummond against the rest of the dataset
At roughly 65 frost-free days, Drummond places 40,154 of 40,283 ZIP codes in this dataset. Within MT, it ranks 378 of 392.
Learn more
Two guides worth reading on 59639: zone vs. frost date, on why Zone 4b and Drummond's frost date answer different questions, and local microclimates, on what one yard in Drummond can differ from the 59639 normal.