Before taking off, the pilot reviewed the weather in person at the College Station FSS, but declined an official weather briefing. He departed in good VFR conditions and flew into an area of known and forecasted low ceilings. While en route, his flight path was over an uninhabited ranch land between Kingsville and Brownsville, TX. By this time, it was a dark night without any visible ground references. At 2056 CDT, the pilot contacted the Alice FSS and requested the Brownsville weather. The 1845 CDT weather (1300 ft overcast) was provided and the pilot was advised that a new weather sequence would be available at 2105 CDT. At 2105, the FSS tried to call the pilot, but there was no reply. On 5/16/82, the plane was found where it had crashed in a steep dive with the right wing low. The 2055 CDT Kingsville weather was: 1500 ft scattered, 2000 ft overcast, visibility 7 miles. The 0854 CDT Brownsville weather was: 1000 ft overcast, visibility 7 miles.