Dillon, MT 59746 Frost Dates
When can you plant in Dillon, MT?
The NOAA station nearest to 59746 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).
How Dillon compares
Dillon's growing season runs about 22 days, ranking 40,278 of 40,283 US ZIP codes measured here, longest to shortest. Within MT, it ranks 392 of 392.
Learn more
zone vs. frost date covers why Zone 5a and Dillon's frost date answer different questions. local microclimates covers what one yard in Dillon can differ from the 59746 normal.