West Pakistan the state capital was moved from Karachi to Army Generals Combatant Headquarters (The GHQ) at Rawalpindi in 1959, whilst the federal legislature was moved to Dacca. In 1963, Rawalpindi had become ineffective as a federal capital; a new city was planned and constructed, finally completing in 1965. In 1965, the state capital was finally re-located in Islamabad. On contrary perception, the provinces did not benefit from economic progress, but the One Unit program strengthened the central government. In West Pakistan, the four provinces also struggled hard for the abolition of One Unit which caused injustices to them as it was
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).