Islamabad-Rawalpindi metropolitan area the larger metropolitan area. It uses dedicated bus lanes for all of its route covering 24 bus stations. As Pakistan's capital city, Islamabad serves as the seat of the federal government and is the country's political center. Rawalpindi has remained important historically, as it hosts the headquarters of Pakistan's army. Rawalpindi also temporarily served as the federal capital when Islamabad was being built in the 1960s, to replace Karachi as the capital. Islamabad-Rawalpindi metropolitan area The Islamabad-Rawalpindi metropolitan area is Pakistan's third most populous metropolitan area. It consists principally of the twin cities of Islamabad and Rawalpindi, along with smaller
Climate of Islamabad affects the upper and northern parts of Pakistan including Islamabad in every month and season. In this scenario Islamabad can receive heavy showers and rains in every month including March. The highest temperature is and the lowest is . The highest rainfall for March is (1984). Another Spring month with pleasant temperatures. The weather pattern of Islamabad in April is identical to that of March. The weather at few times gets hot in this month, the highest temperature recorded was (2006) and lowest temperature is (1994). Humidity remains low in this month about 24%. While the highest rainfall is (1983).