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.
Philadelphia: Annual Weather Averages. July is the hottest month in Philadelphia with an average temperature of 26Â°C (79Â°F) and the coldest is January at 2Â°C (36Â°F) with the most daily sunshine hours at 10 in July. The wettest month is July with an average of 114mm of rain. Loading weather data.