After entering the downwind leg for runway 24, the local controller instructed the flight to extend the downwind leg. Three minutes later, when the airplane was about 4 miles east of the airport, the local controller cleared the flight to turn base followed by a clearance to land. The prevailing visibility was about 4 miles with haze. The pilot was unable to see the airport because of the sun glare mixed with the haze and used the localizer for guidance to the airport. The pilot maintained the base leg altitude until he could readily identify the runway which he did when the airplane was about a mile east of the airport. The pilot immediately began the descent, but when he flared the airplane for landing it began to float. The airplane touched down beyond midfield, bounced three times and the pilot applied hard braking. The airplane swerved to the right, exited the runway, and collided with the fence that traverses north and south at the airport boundary.