Oak Lawn's winters are chilly and variable, with temperatures often dropping below -20°C in January and February, but also experiencing mild periods. Spring arrives slowly, with March marking the beginning of a gradual warming trend, while April and May bring increasingly pleasant conditions. Summer is warm to hot, with July and August being the hottest months, but still relatively moderate compared to other parts of the world. Autumn brings a return to cooler temperatures, with September and October experiencing mild days and chilly nights, before winter's chill sets in again. Overall, the temperature fluctuations are significant throughout the year, but the overall trend is towards mild conditions, except for the coldest months.