Pakistan spans an extraordinary range of climates, from scorching deserts where temperatures hit 50°C to frozen alpine peaks topping 7,000 meters. More than three-quarters of the country falls under arid or semi-arid conditions, but the remaining territory includes temperate valleys and some of the coldest, most glaciated terrain on Earth outside the polar regions.
Three Climate Zones Across One Country
Pakistan stretches from roughly 24°N to 36°N latitude and rises from sea-level coastline to the world’s second-highest mountain. That geographic range produces three principal climate types. The arid zone, covering middle and southern Pakistan, dominates about 75 percent of the land. Temperate conditions appear in the sub-mountain areas of the northwest, accounting for roughly 17 percent of the country. Cold, alpine climate covers a smaller slice in the far northeast, where peaks in Gilgit-Baltistan push above the tree line and stay frozen year-round.
This means a person driving north from Karachi on the Arabian Sea coast could pass through bone-dry desert, irrigated plains with brutal summer heat, green temperate foothills, and eventually reach glaciers fed by some of the heaviest snowfall in Asia, all within the same country.
Summer Heat in the Plains and Deserts
Pakistan’s lowlands experience some of the most extreme heat on the planet. Parts of Sindh and Punjab regularly exceed 45°C in May and June, and temperatures have touched 50°C in recent summers. The Thar Desert, which straddles the southeastern border with India, is the most extreme example. Daytime highs there reach 49°C and occasionally climb to 51°C. Yet the desert also swings dramatically at night: during December and January, lows can drop to 0°C, a daily range of nearly 50 degrees Celsius in the most extreme cases.
Rainfall in the Thar is sparse and unreliable. Some areas average as little as 25 millimeters a year, though pockets closer to the monsoon belt can receive 100 to 500 millimeters depending on how far the summer rains penetrate. Nearly all of this falls between June and September. Winter rain is negligible.
The rest of southern and central Pakistan shares this general pattern of long, intensely hot summers and mild, dry winters, with the critical difference that the Indus River and its canal network turn otherwise arid land into one of the world’s largest irrigation systems. Cities like Multan and Jacobabad are famous for sustained heat waves, with Jacobabad often cited among the hottest inhabited places on Earth.
The Monsoon Season
Pakistan’s most consequential weather event is the summer monsoon, which typically arrives in late June or early July and lasts through September. Moisture-laden winds sweep in from the Arabian Sea and the Bay of Bengal, delivering the bulk of the country’s annual rainfall. Punjab and Sindh depend on monsoon rains to recharge rivers and groundwater, while the northern hills and the Pothohar Plateau near Islamabad receive heavier totals that can trigger landslides and flash floods.
Monsoon intensity varies wildly from year to year. In weak monsoon years, drought grips the southern provinces. In strong years, the Indus and its tributaries overflow, flooding vast stretches of farmland. Floods account for nearly half of all people affected by extreme weather events in the broader South Asian region, and Pakistan has repeatedly ranked among the most climate-vulnerable countries in global risk assessments.
Winter Weather and Western Disturbances
While the monsoon dominates summer, winter precipitation comes from an entirely different source. Weather systems originating over the Mediterranean and traveling east across Iran and Afghanistan bring rain and snow to Pakistan between December and March. These “western disturbances” are driven by large-scale wave patterns in the midlatitude atmosphere, and they are the primary reason northern Pakistan and parts of Balochistan receive winter moisture.
In the plains, winter is cool and mostly dry. Lahore sees daytime highs around 18 to 20°C in January, with nighttime temperatures dipping close to 5°C. Karachi stays warmer, rarely dropping below 10°C. Dense fog frequently blankets Punjab from December through February, disrupting travel and agriculture. In contrast, the northern mountains receive heavy snowfall from western disturbances, building the snowpack that feeds rivers through the following spring and summer.
The Alpine North
Northern Pakistan is home to over a hundred peaks exceeding 7,000 meters, including four of the world’s fourteen highest mountains. The Hindu Kush, Karakoram, and Himalayan ranges converge here, forming part of what scientists call the “third pole,” the largest concentration of glacial ice outside the Arctic and Antarctic. More than 7,000 glaciers exist in this region, and their meltwater feeds the Indus River system that sustains agriculture across the entire country.
Temperatures at high elevations stay below freezing for much of the year, and valleys like Skardu and Hunza experience bitterly cold winters with heavy snow. Lower valleys in Khyber Pakhtunkhwa and Azad Kashmir enjoy a more temperate climate, with warm summers, cool winters, and enough rainfall to support dense forests of pine, cedar, and deodar. Swat and the Galiyat hills near Abbottabad, for instance, feel closer to a European mountain climate than anything typically associated with South Asia.
Climate Pressures and Glacier Loss
Pakistan’s climate is shifting in measurable ways. Himalayan glaciers are projected to lose up to 75 percent of their ice by the end of the century under current warming trends. The Baltoro Glacier in the Karakoram, one of the longest glaciers outside the polar regions, shrank at a rate of 0.9 percent per year between 2003 and 2017. In 2024, parts of northern Pakistan that traditionally receive heavy winter snowfall saw a significant absence of snow, a visible sign of changing precipitation patterns.
Reduced snowfall carries serious downstream consequences. Snow cover in these mountains is projected to decline by up to 25 percent in high-emissions scenarios, which would drastically cut freshwater availability for the Indus and other rivers. Since Pakistan depends on these rivers for drinking water, irrigation, and hydroelectric power, the stakes are existential. At the same time, rapid glacier melt increases the risk of glacial lake outburst floods, sudden releases of water from lakes dammed behind unstable glacial debris. With over 7,000 glaciers in the region, the potential for these events is enormous.
Heat extremes are intensifying too. Recent summers have pushed temperatures to 50°C in parts of the country before peak summer even arrives, compressing the window of livable outdoor conditions for tens of millions of people in the southern provinces.