Average Temperatures for Philadelphia. Philadelphia's coldest month is January when the average temperature overnight is 25.5Â°F. In July, the warmest month, the average day time temperature rises to 85.5Â°F.The driest month in Philadelphia is February with 2.74 inches of precipitation, and with 4.39 inches July is the wettest month.n July, the warmest month, the average day time temperature rises to 85.5Â°F. The driest month in Philadelphia is February with 2.74 inches of precipitation, and with 4.39 inches July is the wettest month.
1 A data set has three quartiles: the lower quartile, the median of the data set, and the upper quartile. 2  Median: The median divides a data set into two equal parts. 3  Lower quartile: Median of the lower half of the data. 4  Upper quartile: Median of the upper half of the data.
There are three quartiles called, first quartile, second quartile and third quartile. There quartiles divides the set of observations into four equal parts. The second quartile is equal to the median.The first quartile is also called lower quartile and is denoted by. The third quartile is also called upper quartile and is denoted by. The lower quartile is a point which has 25% observations less than it and 75% observations are above it.The upper quartile is a point with 75% observations below it and 25% observations above it.he third quartile is also called upper quartile and is denoted by. The lower quartile is a point which has 25% observations less than it and 75% observations are above it. The upper quartile is a point with 75% observations below it and 25% observations above it.