Latest meteorological forecasts for Warsaw on October 4, 2026, indicate a daytime high near 18°C under mostly cloudy skies with light westerly winds and minimal precipitation, aligning with current observational trends and model consensus from sources like GFS. This positions 18°C as the market's near-certain outcome at 100% implied probability, as traders weigh the stable atmospheric conditions and typical early October variability against historical baselines around 12–15°C. Scenarios that could realistically challenge this include a late surge in insolation clearing clouds for brief warming toward 19–20°C or localized measurement differences at official stations, though forecast updates through the evening window remain the key near-term variable.