Recent forecasts for Karachi on September 15 point to a daytime high near 34–36°C, with scattered thunderstorms and a low-pressure system tracking westward from central India likely moderating peak heat through increased cloud cover and moisture. Model runs show consensus on west-southwest winds around 15–20 km/h and humidity near 60% during peak hours, which could suppress temperatures below seasonal norms despite the late-monsoon timing. Historical September maxima average roughly 32–33°C, but recent observations indicate slightly elevated baselines; traders appear to weigh the 25–30% rain probability as the key variable that could cap the daily high at or below 34°C versus drier scenarios allowing brief spikes to 36°C. Updated model guidance and local Met Office briefings over the next 48 hours will clarify steering patterns and convective timing ahead of market resolution.