Addison experiences a humid continental climate (Köppen climate classification Dfa), characterized by four distinct seasons.
Summers are typically hot and humid, with average high temperatures in July reaching into the mid-to-upper 80s Fahrenheit (29-32°C). Winters are cold and often snowy, with January lows frequently dropping into the teens (-8 to -10°C) and highs hovering around freezing. Spring and autumn are mild and transitional, often considered the most pleasant times to visit.
The village receives an average of 38 inches of rainfall annually, distributed fairly evenly throughout the year, and an average of 30 to 35 inches of snowfall during the winter months. As part of the Midwest, Addison is occasionally subject to severe weather, including intense summer thunderstorms, high winds, and the occasional tornado watch.
