Winter months in Oak Park are typically cold and variable, with temperatures often dropping below freezing. January is the coldest month on average, but February can be even chillier, with a wider range of temperatures. As winter gives way to spring, March brings more moderate temperatures, while April and May see steady warming trends, with the latter marking the beginning of warmer months. Summer temperatures are warm to hot, with July and August often seeing highs above 30°C, but also experiencing some cooler days. Autumn brings a return to milder conditions, with September being relatively pleasant before the onset of cooler weather in October and November.