It's impossible to deny any longer that the weather outside is getting colder.

The temperature has already dropped below freezing in eastern South Dakota at times this fall and, before long, even more frigid weather will undoubtedly arrive. The forecast in the Sioux Falls area over the next week includes highs in the 50s and lows in the 30s and 40s, according to the National Weather Service .

With colder-than-normal conditions predicted this winter across the upper Midwest, including South Dakota, it's once again time to decide: When is it cold enough to turn on the heat?

Here's what experts have to say about it.

Related: What will winter be like in South Dakota? Here's what the Old Farmer's Almanac predicts for 2025-26

When should I turn on my heat in the fall?

Many heati

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