Pakistan has a varity of climates with the south being hot and arid and the north near the Himilayas being more cooler, wet and tempreate. This variation leads to different weather at differennt parts of the country as it is common for snow to fall in the winter in the north but to have milder winters in the south. The country have four seasons over the year; the dry cool winter and hot springs and comming and retreating monsoon period from summer to fall. The monsoon period starts from around June and ends around Novermber and involvers a large amount of rain. The seasons and the intensity of the monsoons rains vary for region to region.
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 38 °C in June. Half of the annual rainfall occurs in July and August, averaging about 255 millimeters in each of those two months. The remainder of the year has significantly less rain, amounting to about fifty millimeters per month. Hailstorms are common in the spring.
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. In Islamabad, there are cold winds from the north of Pakistan.
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. These westerly waves are robbed of most of the moisture by the time they reach Pakistan.
Fog occurs during the winter season and remains for weeks in upper Sindh, central Khyber Pakhtunkhwa and Punjab
Southwest Monsoon occurs in summer from the month of June till September in almost whole Pakistan excluding western Balochistan, FATA, Chitral and Gilgit–Baltistan. 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.
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.
Continental air prevails during the period when there is no precipitation in the country.
Dust storms occur during summer months with peak in May and June, They are locally known as Andhi. These dust storms are quite violent. Dust storms during the early summer indicate the arrival of the monsoons while dust storms in the autumn indicate the arrival of winter.
Heat waves occur during May and June, especially in southern Punjab, central Balochistan and Sindh.
Thunderstorms most commonly occur in northern Punjab, Khyber Pakhtunkhwa and Azad Kashmir.