WEATHER AND CLIMATE OF PAKISTAN Introduction Pakistan extends along either side of the historic Indus River, following its course from the mountain valleys of the Himalayas down to the Arabian Sea. It includes a wide variety of landscapes, from arid deserts to lush, green valleys to stark mountain peaks. Effect of Location on Climate of Pakistan Pakistan lies in the temperate zone, approximately between 24° and 37° north latitude, and between 61° and 78° east longitude.The climate is generally arid, characterized by hot summers and cool or cold winters, and wide variations between extremes of temperature at different locations. For example, the coastal area along the Arabian Sea is usually warm, whereas the frozen snow-covered ridges of the Karakoram Range and of other mountains of the far north are cold . (Cont…) Effect of Location on Climate Of Pakistan Pakistan's climate varies according to elevation. April through September are the most pleasant months in the mountains, although they bring oppressive heat to the low-lying plains of the Indus Valley, where midday temperatures can exceed 40 degrees Celsius. December through February are the coolest months, as lowland temperatures drop to between 10-25 degrees C (50-77 degrees F) and the air in the mountains falls below freezing. Winter in northern areas Spring in Pakistan Seasons Of Pakistan Pakistan has four seasons. The onset and duration of these seasons vary somewhat according to location: (i) Cold season (December to March). (ii) Hot season (April to June). Lake Saif ul Maluk in Winter (Cont…)Seasons Of Pakistan (iii) Monsoon season (July to September). (iv) Post-Monsoon season/ Autumn (October and November). Monsoon in Islamabad Autumn in Pakistan Rain in Karachi Temperature Pakistan can be divided into four broad temperature regions: 1. Hot summer and mild winter: 32o C or more in summer and 10 to 21o C in winter. 2. Warm summer and mild winter: 21 - 32oC in summer and 10 to 21oC in winter. Map showing maximum temperature regime (Cont..) Temperature 3. Warm summer and cool winter: 21 - 32oC in summer and 0 - 10oC in winter. 4. Mild summer and cool/cold winter: Summer temperature between 10 and 21oC and winter temperature between 0 and 10oC. Map showing minimum temperature regime Highest Temperature in Pakistan The highest temperature ever recorded in Pakistan is 53.5 °C (128.3 °F) which was recorded in Mohenjo Daro, Sindh on 26 May, 2010. It was not only the hottest temperature ever recorded in Pakistan but also the hottest reliably measured temperature ever recorded on the continent of Asia and the fourth highest temperature ever recorded on Earth. Heat records were broken in Multan in June 1993, when the mercury was reported to have risen to 54° C. Rainfall There are two sources of rainfall in Pakistan: the Monsoon and the Western Depression. The former takes place from July to September and the latter, December to March. The upper parts of Pakistan sometimes get rain from the Western Disturbance almost every month and from June till September almost whole country is lashed by South West Monsoon rain. Rainclouds at Shams Bari Northern areas of Pakistan (Cont..) Rainfall Western Disturbances Western Disturbances mostly occur during the winter months and cause light to moderate showers in southern parts of the country while moderate to heavy showers with heavy snowfall in the northern parts of the country, temperature also decreases due to it. These westerly waves are robbed of most of the moisture by the time they reach Pakistan. (Cont…) Rainfall Southwest Monsoon Southwest Monsoon occurs in summer from the month of June till September in almost whole Pakistan excludingwestern Balochistan. Monsoon rains bring much awaited relief from the scorching summer heat. These monsoon rains are quite heavy by nature and can cause significant flooding, even severe flooding if they interact with westerly waves in the upper parts of the country Rainfall in Islamabad Floods In 2010, almost all of Pakistan was affected when massive flooding caused by record breaking rains hit KhyberPakhtunkhwa and Punjab. The number of individuals affected by the flooding exceeds the combined total of individuals affected by the 2004 IndianOcean Tsunami and the 2005 Kashimr earthquake. At least 2,000 people died in this flood and almost 20 million people were affected by it Flood of 2010 Heat Waves Heat waves occurs during May and June that causes stroke problems in the country, especially in southern Punjab, central Balochistan and interior Sindh. Tropical Storms Tropical Storms usually form during the summer months from late April till June and then from late September till November. They affect the coastal localities of the country. Dust storm Dust storm occur during summer months with peak in May and June, They are locally known as Andhi. These dust storm are quite violent. Dust storms during summer indicates arrival of monsoon while dust storms in winter indicates the arrival of winter season. Fog Fog do occur during the winter season and remains for weeks; it usually occur in upper Sindh, central Khyber Pakhtunkhwa and northern plains of Punjab. Fog in Faisal Abad Fog at Shangla Paa Variation Of Climates in Different Cities Climate in the capital city of Islamabad The climate in the capital city of Islamabad varies from an average daily low of 2° C in January to an average daily high of 40° C in June. Half of the annual rainfall occurs in July and August, averaging about 255 millimeters in each of those two months. Hailstorms are common in the spring. Ever changing Weather in Islamabad (Cont..) Variation Of Climates Climate in Karachi Pakistan's largest city, Karachi, which is also the country's industrial center, is more humid than Islamabad but gets less rain. Only July and August average more than twenty-five millimeters of rain in the Karachi area; the remaining months are exceedingly dry. The temperature is also more uniform in Karachi than in Islamabad, ranging from an average daily low of 13° C during winter evenings to an average daily high of 34° C on summer days. Although the summer temperatures do not get as high as those in Punjab, the high humidity causes the residents a great deal of discomfort. Karachi Rain City of Karachi