(Source: Wikipedia) - Brief information and overview of Springfield

Springfield is the capital city of the U.S. state of Illinois and the county seat of Sangamon County. Its population was 114,394 at the 2020 United States census, making it the state's seventh-most populous city, the second-most populous outside of the Chicago metropolitan area (after Rockford) and the most populous in Central Illinois. Approximately 208,000 residents live in the Springfield metropolitan area which consists of all of Sangamon and Menard counties.

Climate in Springfield :
Under the Köppen climate classification, Springfield falls within either a hot-summer humid continental climate (Dfa) if the 32 °F (0 °C) isotherm is used or a humid subtropical climate (Cfa) if the 27 °F (−3 °C) isotherm is used. In recent years, winter temperatures have increased substantially while summer temperatures have remained equal to the period 30 years before. Hot, humid summers and cold, rather snowy winters are the norm. Springfield is located on the farthest reaches of Tornado Alley, and as such, thunderstorms are a common occurrence throughout the spring and summer. From 1961 to 1990 the city of Springfield averaged 35.25 inches (895 mm) of precipitation per year. During that same period the average yearly temperature was 52.4 °F (11.3 °C), with a summer maximum of 76.5 °F (24.7 °C) in July and a winter minimum of 24.2 °F (−4.3 °C) in January.