Pakistan's Rising Heat: What the 2024-2025 Temperature Records Mean

The Numbers Behind the Heat

Pakistan's average temperature in 2024 reached 23.52°C — roughly 0.71°C above the long-term average, according to Pakistan Meteorological Department's annual climate report. To most people, less than one degree sounds trivial. It isn't. This figure, published in January 2025, reflects a pattern that climate scientists have been watching across South Asia for years. And it came alongside some of the worst heatwaves Pakistan's weather records have ever documented.

The trend continued into 2025. Parts of Sindh province — a major agricultural region in southern Pakistan — saw temperatures 5–7°C higher than normal for that season. When temperatures rise this far above typical levels, conditions move beyond "uncomfortably hot" into territory that damages infrastructure, reduces crop yields, and poses serious health risks for outdoor workers, according to PMD's 2025 climate summary.

When and Where It Happened

The most disruptive heatwave began on May 23, 2024, sweeping across the plains of Punjab, Sindh, and parts of Balochistan, according to PMD's May 2024 monthly report. The timing matters more than it might seem. Late May sits at a crucial moment: the dry season is peaking, wheat has just been harvested, and newer crops like cotton are beginning to germinate—a time when soil moisture and irrigation are critical.

Punjab's canal-fed farms and the lower Indus River basin in Sindh are not just geographic terms on a map. They grow most of Pakistan's wheat, rice, cotton, and sugarcane. A severe heatwave hitting these regions in late May simultaneously creates three problems: a food-security crisis, a public-health emergency, and an economic shock. Energy demand surges, rolling power outages worsen, and workers—especially in agriculture and informal jobs—lose income precisely when they need stability most.

The 2025 Sindh temperatures add another worry. A 5–7°C spike is extreme enough that it pushed some areas toward "wet-bulb" temperatures—a measure combining heat and humidity—that approach the limits of human survival for unshaded outdoor work. Epidemiologists and city planners in Karachi have sounded this alarm repeatedly since 2015, when a heatwave killed over 1,200 people in the city.

Why the Baseline Number Is Misleading

The 0.71°C national average for 2024 needs careful reading. Pakistan's climate is already hotter than the global average because of its geography: vast, light-colored alluvial plains that absorb heat, an arid landscape with little moisture to cool the air, and mountain ranges (the Hindu Kush and Himalayas) that channel hot air into the Indus River basin during the pre-monsoon season.

In this context, a 0.71°C national departure masks a bigger truth. Regional extremes—like the 5–7°C spike in Sindh—are far more dramatic than the national average suggests. A government official or infrastructure planner relying only on the national number would seriously underestimate how extreme conditions actually are in vulnerable areas. The national average smooths over the real geographic inequality in heat exposure that actually matters for planning.

This is not a new problem in South Asian climate science. After major flooding and heat events in 2010, researchers found that Pakistan's national climate reports were slow to capture local extremes that ground weather stations and satellite data detected immediately. The tendency to report upward-averaged numbers is common everywhere, but in Pakistan—where the gap between national conditions and local extremes is built into the geography—it carries real consequences for policy decisions.

What This Means for Planning Ahead

For people working in sectors directly exposed to Pakistan's heat—farming, energy, public health, insurance—the events of 2024–2025 carry weight beyond each individual crisis.

The pattern here is important. A measurable long-term increase in average temperature (the 2024 baseline rise) combined with sharper extreme events (the May 2024 heatwave and 2025 Sindh spike) matches what climate scientists call "loading the dice": when the entire distribution of temperature outcomes shifts upward, both the average and the extremes increase together. This means heat thresholds that used to occur every 50 years, for example, might now occur every 15 or 20 years. Models still built on weather data from before 2000 are underestimating future risk.

Pakistan officially acknowledges climate vulnerability in its National Disaster Risk Reduction Policy and its climate commitments under the Paris Agreement. But acknowledgment is not the same as action. Most of Pakistan's heat response plans were designed using the 2015 Karachi heatwave as the worst-case reference point. If 2024–2025 represents a new normal rather than a one-time spike, those plans are already out of date.

The Economic and Political Stakes

Pakistan's financial situation makes this heat problem more urgent. The country entered 2024 under IMF conditions, with a weak foreign currency position and heavy debt in the energy sector that limits the government's ability to expand electricity grids as cooling demand rises. Agriculture—roughly a quarter of GDP and a larger share of rural jobs—loses productivity in extreme heat. When wheat and cotton yields drop, Pakistan must spend more foreign currency on imports or earns less from exports, tightening an already thin financial margin.

International climate finance is theoretically available for adaptation. Pakistan negotiated the Loss and Damage fund at global climate talks, and negotiators from poorer countries regularly point out that Pakistan contributes little to global emissions yet faces enormous climate risk. But translating fund agreements into actual money flowing to projects remains slow—a structural problem in the global climate finance system that practitioners across South Asia recognize as chronic, not temporary.

What We Still Don't Know

The Pakistan Meteorological Department's reports are reliable for what they measure—temperature data. But they mostly show what happened, not what comes next. They don't project future scenarios under different emission pathways, and they don't link the heat data to specific health deaths, crop losses, or economic damage. That translation work exists in academic research, but it's not yet woven into Pakistan's national climate reporting in a way that directly shapes budget or planning decisions.

This gap is not unique to Pakistan, but it's more urgent there. Countries with bigger financial buffers and lower baseline heat exposure can absorb these gaps more easily. The missing link—connecting raw meteorological data to concrete risk estimates that policymakers can plan around—is where Pakistan needs institutional investment next.

Where Things Stand Now

As of mid-2026, Pakistan has two consecutive years of official temperature records showing extremes: the 2024 national mean rise and the 2025 Sindh spike. These confirm a pattern that climate scientists have long projected but that public discussion has been slower to accept as a present planning problem rather than a distant future threat. The fact that these events are spreading geographically and repeating more frequently makes it harder to call them "unprecedented." What was exceptional is becoming routine. Routine crises demand structural change, not just emergency responses patch by patch.