The magnetic compass is an old Chinese invention, probably first made in China during the Qin dynasty (221-206 B.C.). Chinese fortune tellers used lodestones (a mineral composed of an iron oxide which aligns itself in a north-south direction) to construct their fortune telling boards.
Guide to Pennsylvania weather in April. The average maximum daytime temperature in Pennsylvania in April is a comfortable 17Â°C (63Â°F). The average night-time temperature is usually a cold 5Â°C (41Â°F). There are usually 7 hours of bright sunshine each day, which represents 55% of the 13 hours of daylight. Expect 95mm (3.7 inches) of rainfall across the whole of April with 11 days with some rain falling.
Summary of temperatures and weather in April: Average temperature: 17Â° C or 62.6 F. Maximum temperature: 22Â° C or 71.6 F. Minimum temperature: 14Â° C or 57.2 F. Our Advice. You can see from the weather log below that most of the time it sunny with some cloud during the month of April.