Karachi, 12 December 2025 – Karachi is expected to experience colder nights from December 15 onwards, the Pakistan Meteorological Department (PMD) has warned, even as the city remains dry and hazy during the day.
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On Friday, humidity in the city reached 93%, with northeasterly winds at around nine kilometres per hour. The PMD forecast a maximum temperature of 31°C and cautioned that cold will intensify from mid-December.
Climate expert Dr Zainab Naeem attributed the current shorter, drier winter pattern to the La Nina phase of the El Niño–Southern Oscillation (ENSO) and the effects of climate change. She explained that La Nina reduces winter rainfall over South Asia, while climate change has further shifted rainfall trends and shortened the winter season.
Dr Naeem highlighted that rainfall in October, November, and December has decreased significantly in recent years, affecting crops and raising drought risks. She also noted that daytime temperatures in major cities tend to be higher than normal, while nighttime temperatures are lower due to dry air absorbing and releasing heat more rapidly.
While light rains may occur after mid-December, their intensity will remain below historical averages. The PMD also expects less snowfall this winter, slightly above-normal temperatures, and continued risk of drought, despite projections of a 26% higher monsoon rainfall next year.
Dr Naeem warned that Pakistan must strengthen climate action and disaster preparedness, citing the increasing frequency of floods and extreme weather events, particularly in rural areas. She stressed the importance of connecting science and policy to mitigate the impacts of climate change and plan effectively for winter and summer seasons.
