A vehicle photosensing system includes a photosensor array that is disposed within the interior cabin of the vehicle and having a field of view forward through the windshield of the vehicle. The photosensing system further providing a control for either controlling operation of a vehicle headlight or monitoring a surface condition of the windshield of the vehicle. If controlling the vehicle headlight, preferably the control transitions the headlight from a first beam mode to a second beam mode in response to detection of a headlight and/or a taillight by the photosensor array within its forward field of view. If monitoring a surface condition of the windshield of the vehicle, the photosensing system operates the vehicle's windshield wiper system in response to a signal generated by the control.