A color image forming apparatus includes a first temperature detection unit configured to detect a temperature of an exposure device, a second temperature detection unit configured to detect a temperature of a photosensitive member, a color registration pattern detection unit configured to detect a color registration pattern formed on a transfer member, an actual-measurement-based color registration adjustment value calculation unit configured to calculate an actual-measurement-based color registration adjustment value from a result of the detection of the color registration pattern detection unit, and a prediction-based color registration adjustment value calculation unit configured to calculate a prediction-based color registration adjustment value from the temperature of the exposure device detected by the first temperature detection unit and the temperature of the photosensitive member detected by the second temperature detection unit.