A control apparatus for a utility machine configured to automatically work outdoors including a work actuator installed in the utility machine, a setting unit setting a time schedule of the utility machine in advance, an information acquiring unit acquiring current and future weather information for a work site or nearby, an adjusting unit adjusting the time schedule based on the weather information acquired by the information acquiring unit, and an actuator control unit controlling the work actuator so that the utility machine works in accordance with a time schedule adjusted by the adjusting unit.