Even though winter does not officially start until late December, Minnesota usually begins experiencing winter - like conditions in November, sometimes as early as October. As with many other Midwestern states, winter in Minnesota is characterized by cold (below freezing) temperatures and snowfall. Weather systems can move in from the north, west, or south, with the majority of the weather being driven in from the north. A vigorous jet stream brings high and low - pressure systems through in quick succession, which can cause large temperature variations over a short period of time.
when does it start getting cold in montana
November