Winters in Orland Park are quite chilly, with temperatures often below freezing and frequent dips into single-digit lows. By March, the weather starts to warm up significantly, with average highs reaching around 6°C. Spring brings a gradual increase in temperature, with April and May averaging above 10°C and 15°C respectively. Summers are warm but not sweltering, with temperatures rarely exceeding 34°C and generally staying comfortable around 23-25°C. As autumn approaches, the temperature cools down again, returning to average highs around 16°C by October.