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.
Most / Least Educated Cities in PA. The average temperature of Lehigh Valley is 51.26Â°F, which is higher than the Pennsylvania average temperature of 49.80Â°F and is lower than the national average temperature of 54.45Â°F. Topics: Heating Cost Index Cooling Cost Index Historical Temperature Historical Precipitation Historical Snow Historical Humidity Historical Wind Speed