Hello. I remember reading somewhere that Springfield, MO was number one on a list of cities with the wackiest weather. From personal experience, nothing could be closer to the truth. The area is known for sudden weather shifts and turbulent weather. I live in Ozark, and one week during January, the temperature dropped below zero degrees early in the week, and towards the end of the week the temperature climbed to 60. This is just one example of the strange weather in the Ozarks. Also, a big difference in daily high and low temperatures is common, especially in the spring and fall.
I will say that Missouri springs and falls are absolutely beautiful. A characteristic of the Ozarks is that there are 4 very distinct seasons.

Just to give you an idea of weather during the year, according to weather.com, here are averages for January, April, July, and October:
-Jan. - High 40, Low 20
-Apr. - High 66, Low 42
-July - High 87, Low 65
-Oct. - High 69, Low 44
Climate, of course, is relative. I come from Iowa originally, and to me, winters in the Ozarks are mild in comparison. Here, blizzards are very uncommon and the temperature never drops very far below zero. We also have a lot of warm days in the winter. However, we do get ice storms in January and February most years.
Summer here is very hot to me. A few years ago, we had 90 days of 90 degrees. That's hot! To an Arizonian, this might be considered mild. However, that was just a hot summer, but the weather reaches close to 90 on most days.
In short, in the Ozarks, you will experience a little bit of everything, as far as weather is concerned. You need a heavy coat, but you also need summer clothes. Personally, I appreciate different kinds of weather, so I am right at home in the Ozarks.