Pakistan Weather, climate and geography
Pakistan has three seasons: winter (November to March) is warm and cooled by sea breezes on the coast; summer (April to July) has extreme temperatures and the monsoon season (July to September) has the highest rainfall on the hills. Karachi has little rain. Global warming is starting to become apparent in Pakistan with warmer winters, glacial melt and a slight dip in temperature in the summer months.
The best time to visit southern Pakistan is between November and March, when the days are cool and clear. The best time to visit northern Pakistan, for trekking, is from April to October; outside of these months it will be snowy and very difficult to reach many mountainous places. Bear in mind that the monsoon plays havoc with travel in Pakistan and is not to be taken lightly, as we have witnessed recently with the devastating floods of 2010, which were the worst in 80 years.
Wear lightweights, with warmer clothing, including base-layers and woollens, for upland areas in the winter. Good trekking boots are a must for mountain explorers, as are walking poles and thermals. Visitors can buy woollen socks and sweaters at a very good price in the bazaars of Pakistan, but they might not be up to western standards and will be quite heavy.
Rainwear is advised for the monsoon season so if you are to spend any time in the cities during this time, do not rule out the possibility of bringing along some wellington boots as the rain can be torrential resulting in very flooded lanes. It’s easiest to buy the necessary shalwar kameez (tunic and baggy trousers) when you land in Pakistan - this is essential for women, and optional, but advisable for the heat more than anything, for men. In the intense heat it may be tempting to lose layers – in respect of local customs, and to spare yourself unwanted harassment and disapproval, it is far wiser to cover up in cool, white flowing cottons, like the Pakistanis do, thus keeping the sun off too.