**Forecast consensus for Jeddah on August 25, 2026, centers on a maximum near 37–39°C under typical late-summer conditions.** Multiple numerical weather models and official guidance, including those from sources like the Met Office, Worldmeteo, and regional services, indicate a high of 37–39°C with mostly sunny skies, light to moderate northwesterly winds, and negligible precipitation risk. This range aligns with Jeddah’s climatological August average high of approximately 38°C at the coastal King Abdulaziz International Airport station. Recent observations show daily maxima fluctuating between 37–40°C through mid-to-late August 2026, with no anomalous heatwave or cooling influences such as increased cloud cover or stronger onshore flow. Stable subtropical high pressure, clear skies, and modest humidity levels (dew points around 20–25°C) support efficient daytime heating without significant moderation or convective suppression. Model agreement is strong on these parameters, keeping the probability of extremes (below 36°C or 40°C+) low. Market-implied odds reflect this evidence-based outlook, with 38°C as the modal outcome (44%) because it matches the central tendency of current ensemble forecasts. The modest spread to 37°C and 39°C accounts for minor run-to-run variability inherent in short-range prediction, while the low weighting on 40°C+ acknowledges the absence of conditions that historically produce outliers in this location. Updated model runs or surface observations on the morning of the 25th remain the primary near-term catalysts that could refine these probabilities.