Ratio data is interval data with a natural zero point. For example, time is ratio since 0 time is meaningful. Degrees Kelvin has a 0 point (absolute 0) and the steps in both these scales have the same degree of magnitude.
Bethlehem, PA Weather. The average temperature of Bethlehem is 51.25Â°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. Historical Weather.
The reason Bethlehem â which is really in a desert â does have cold weather is because it is on a range of hills and at an elevation of 2,400 meters above sea level it. During the winter in Bethlehem humidity rises and in January â the coldest month in Bethlehem â humidity reaches an average of 73%. The temperatures in Bethlehem in winter range from an average minimum of 7C/45F in January to an average high of 25C/77F in November and April.