Any engine will condensate especially in colder eweather. Just because the temp gauge gets warm doesn't mean that the engine is up to operating temperature. It just says that the coolant is. The engine needs to be run long enough to completely warm up and long enough to evaporate the condensation out of the system. This isn't just a drive across town but at least a ten mile or more drive. Condensation is natural byproduct of an internal combustion engine at all temperatures but shows up more and takes longer to evaporate out in cooler/cold temperatures.