**Forecast models indicate stable, sunny conditions over Jeddah on September 28, 2026, with peak daytime heating expected under clear skies and light westerly winds of 5–7 m/s.** Multiple sources project afternoon highs of 35–36°C (roughly 95–97°F), aligning closely with the market’s leading outcomes at 45.5% for 36°C and 38% for 35°C. High humidity (50–75%) will elevate heat indices above 40°C, but no precipitation or significant cloud cover is anticipated to suppress temperatures. Minor forecast spread between 35°C and 36°C stems from small differences in model timing of maximum insolation, local wind mixing near the Red Sea coast, and measurement precision at the official station. Historical September averages near 37–38°C provide context, yet the current pattern shows slightly moderated values with no major synoptic shifts expected before resolution.