Abstract
Rainfall of Pakistan big cities (Karachi, Peshawar, Quetta, Lahore, and Islamabad) are investigated by the probability distribution. The time series range of monthly analysis (1961 to 2015) is used. In this study, Johnson SB, Gen. Pareto, Pareto 2, Power function and Weibull are fitted for rainfall. The significance of probability distribution is estimated by Kolmogorov-Smirnov, Anderson Darling and Chi-square statistical tests. The Johnson SB is the bestfitted distribution observed for each rainfall cities using Chi-square test, while the other two test shows the variation in
