What is the temperature of bottom of frozen lake in winter season why?

The temperature at the bottom of a frozen lake in winter typically stays just above freezing, often around 0 to 4 degrees Celsius (32 to 39 degrees Fahrenheit). This occurs because ice, being less dense than liquid water, floats on the surface, insulating the water below. Additionally, the temperature of the water beneath the ice remains relatively stable due to its high specific heat capacity, preventing it from freezing completely. This phenomenon helps sustain aquatic life during the cold winter months.