Pilot reported the AWOS at CPT; Cleburne Regional Airport; is inaccurate. After receiving the weather and interpreting it as VFR; the pilot inadvertently entered IMC conditions after takeoff.

Narrative

The unreliable AWOS at CPT airport led me to believe that the haziness I saw was less of a factor than it became. I was looking at the haziness in the dark before dawn. Before driving to the airport; the weather data online showed VFR for Cleburne and airfields to the west. IFR conditions existed at airfields east. Within a few minutes of dawn was when I began my taxi to the runway. Using the aircraft radio to check the current AWOS on taxi the conditions were said to be 4nm visibility with ceiling missing. Immediately after takeoff at approximately 100 ft. AGL I found myself in IMC with occasional visual contact with terrain. I went to instruments and weighed options. I felt my choices were: climb to cope; confess and request guidance for a return for landing or remain in visual contact; stay low and use my foreflight for orientation and return to land. I am very familiar with the terrain and features at Cleburne so elected to stay low. My aircraft is not equipped for precision approaches nor am I qualified to do them. I stayed at 200 ft. AGl for a lap in the pattern and returned for an uneventful landing. Later in the morning I learned from the mechanic at the field that the AWOS is notoriously unreliable. I had a discussion with the airport manager. I was informed that the AWOS system is scheduled for replacement as soon as they can get through red tape with the city for funding.