Recent ensemble forecasts from global models highlight a cool maritime air mass and extensive cloud cover over central Poland as the dominant factors capping Warsaw's July 21 maximum near 18–19 °C, aligning with the closely matched market-implied probabilities. Persistent northeasterly flow and possible light precipitation are expected to limit solar heating and suppress afternoon peaks compared to typical July climatology of 23–24 °C. Minor differences between 18 °C and 19 °C outcomes hinge on the precise timing of any partial clearing or boundary-layer mixing in the final model runs, while slight upside to 20 °C would require faster advection of warmer air than currently indicated. Traders appear to weigh the narrow spread against inherent short-range forecast uncertainty two days out.