Coalville has a high-altitude, warm-summer humid continental climate (Köppen "Dfb"), characterized by extreme diurnal temperature ranges that range from extremely cold winter nights to hot afternoons in the summer. However, the high altitude and low humidity means that mornings in the summer remain very cool, and frosts have occasionally occurred—even in July. Precipitation is moderate throughout the year, though with a minimum in summer, and snow accumulation is generally heavy due to the very cold nights between November and March, with a median of for the year.