Recent Pakistan Meteorological Department guidance and international model consensus point to a maximum temperature in the mid-30s Celsius for Karachi on May 18, reflecting stable pre-monsoon conditions with no major synoptic system approaching. The city’s coastal location introduces key variability through the timing and strength of the sea breeze, which often limits daytime heating; stronger onshore flow can hold readings near 34°C while weaker flow allows brief spikes toward 36°C. Persistent high humidity and near-normal to slightly above-average temperatures across coastal Sindh, as noted in the latest weekly outlook, further tighten the range without triggering a local heatwave alert. Minor differences in cloud cover or wind patterns over the next 48 hours remain the main factors that could shift the observed high between the closely matched 34–36°C bands.