The pilot not maintaining proper glideslope and localizer alignment during the precision instrument approach, the pilot continuing flight below the decision height, the pilot not performing a missed approach, and the pilot not maintaining altitude/clearance from the trees and terrain. Contributing factors to the accident were the air traffic controller not issuing the current weather conditions to the pilot prior to the approach clearance, the weather conditions being below the instrument approach landing minimums, the pilot's lack of recent experience in instrument flight rules (IFR) operations and the pilot disregarding federal regulations regarding instrument currency.