Background
The airplane was parked overnight in 20-degree Fahrenheit weather. The following morning, the temperature was around 32 degrees at the time of departure.
Preflight Observations
During the preflight inspection, the pilot observed an accumulation of frost on the front windshield and scraped some of it off. The pilot reported no frost elsewhere on the airplane but was unable to examine the upper surface of the wings. A passenger stated that he observed frost on all exposed upper aircraft surfaces prior to takeoff.
Takeoff and Climb
During the engine run-up and ground roll portion of the takeoff, all gauges indicated normal engine operation. The pilot reported that upon rotation, the windshield began to 'glaze over,' and by the time he had climbed to 100 feet above ground level, forward visibility was about zero.
Accident Sequence
The pilot stated that he then raised the airplane nose for a few seconds to ensure clearing obstacles he knew were located at the end of the runway. The airplane was at stall speed and descended into the terrain adjacent to the runway.