Coeur d'Alene has a humid continental climate (Köppen Dsb), characterized by a cold, moist climate in winter, and very warm, dry conditions in summer. The monthly daily mean temperature for January is 28.4 °F (−2.0 °C), while the same figure for August is 69.2 °F (20.7 °C); the annual mean is 48.2 °F (9.0 °C). Temperatures exceed 90 °F (32 °C) on 22 days per year, occasionally reaching 100 °F (38 °C), while conversely, there may be several nights below 0 °F (−18 °C). Snowfall averages 46 inches (117 cm) per year; precipitation is generally lowest in summer. The frost-free season runs about 120 days from mid-May to mid-September
