There is no reason to believe that cold weather can kill new coronavirus or other diseases. The normal human body temperature remains around 36.5°C to 37°C, regardless of the external temperature or weather. The most effective way to protect yourself against the new coronavirus is by frequently cleaning your hands with alcohol-based hand rub or washing them with soap and water.

Cold weather and snow CANNOT kill the new coronavirus. 2
An interactive web-based dashboard to track COVID-19 in real time.