Winter in Islamabad, normally cold from December to February, is getting warmer with nights losing their usual chill. Night temperatures, which once often fell between 1°C and 4°C, are rising faster than daytime highs. This means winters are shorter and less cold. Data from the Pakistan Meteorological Department from 1981 to 2025 shows this clear warming trend. Danish Baig, head of Meteorology at WeatherWalay, said, "Such a weather pattern suggests a transition towards a more thermally moderated winter climate regime." The Intergovernmental Panel on Climate Change (IPCC) confirms that rising greenhouse gases are causing hotter days and warmer nights worldwide since 1950. Experts say urban growth and deforestation in Islamabad add to this warming. Dr Muhammad Afzaal of the Pakistan Met Department pointed out that the rapid city expansion since the 1990s has increased the urban heat island effect, making nights especially warmer in winter. More built-up areas and fewer trees trap heat. Local residents have noticed the change. Nasir Jamil from Gokina village recalled that in the 1980s, Margalla Hills had snow caps in winter — now rarely seen. Climate policy expert Ali Tauqeer Sheikh advised that Islamabad's city planning must focus on indigenous green solutions like groundwater recharge and planting heat-resistant trees to cool the city. Meanwhile, the Karachi Urban Lab supports these findings, showing similar warming trends over 60 years. Dr Nausheen H Anwar warned that planting trees alone is not enough; comprehensive risk mitigation and global fossil fuel reduction are needed to tackle extreme climate impacts. The rising winter temperatures affect more than just comfort. Baig explained it disrupts energy use, increases smog, cuts frost events, and impacts crop chilling needs in northern Pakistan. The IPCC also warns that changing rainfall and heat will lower staple crop yields. Dr Mukesh Gupta of IPCC Working Group II said, "Adaptation strategies, including the development and use of climate-resilient seeds, can mitigate some impacts, but financial and technological barriers limit their adoption in low-income countries like Pakistan." He stressed that better resources and technologies are vital to fight the looming food crisis caused by climate change. As Islamabad’s nights continue to lose their chill, scientists and policymakers urge urgent action to adapt and reduce climate risks to protect both environment and people.