This week, many Midwesterners could be waking up to frost or even a hard freeze. Much-colder weather is on the horizon for the Corn Belt as the first week of October comes to an end. Coming from Canada, the cold air brings with it the possibility of a hard freeze in North Dakota, northern Minnesota and northern South Dakota.

The frost and freeze potential will move further south including Iowa, Michigan, Wisconsin, northern Illinois and northern Indiana into the weekend. To round out 2023, the most important weather pattern to watch will be the Pacific Jet Stream. The recent resurgence of La Niña could bring an early onset of fall rain and snow in the Pacific Northwest and an increase in a fall low-pressure system development across the country.

Read more on upcoming weather forecasts here.