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.
Find the best month to visit Philadelphia based on the weather. Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Expect 17Â°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Philadelphia in April. Check more long-term weather averages for Philadelphia in April before you book your next holiday to Pennsylvania in 2018.