Winters in McLean are cold and relatively consistent, with temperatures typically ranging from around -9°C to 15°C throughout January and February. Spring brings a gradual warming trend, with March temperatures averaging near freezing by the end of the month, while April and May see significant increases, often reaching highs above 30°C. Summer is warm but not excessively hot, with July and August temperatures rarely exceeding 35°C, while still averaging around 26°C. Autumn sees temperatures cool again, dipping back into single-digit lows in November, before stabilizing in the mid-range by December.