The ideal working temperature range for the Navistream tablet is 0 to 30 degrees Celsius.
You may see the following popup if the tablet is too cold to charge:
We recommend your tablet(s) NOT be left outside in or near freezing temperatures. Doing so can drain the battery and prevent you from starting your tablet in a timely manner or cause permanent damage and require a replacement.
Conversely, during hotter temperatures, we recommend locating the tablet out of direct sunlight if possible, and away from any other sources of heat in the vehicle it is installed into. The tablet will become slower when overheated, which may lead to a decrease in performance, potentially cause data corruption or damage to the tablet itself.