The pilot reported that he obtained weather information via the Internet prior to departing on a cross-country flight. Additionally, during the flight, he monitored automated weather reports via radio. About 2 hours into the flight, when the airplane was 17 miles from the destination airport, the wind increased to 25 knots and rain began. The pilot performed a 180-degree turn; however, the rain and turbulence increased, along with a decrease in visibility and ceiling height. The pilot then performed a precautionary landing on a road. About 200 feet into the landing roll, the airplane veered left off the road and struck an orange tree, which separated the right wing. The pilot added that there were no preimpact mechanical malfunctions with the airplane and that he should have reversed course 20 minutes sooner.