Forecast models from sources including GFS and ECMWF show a stable high-pressure system over central Europe driving clear to partly cloudy conditions and light southeasterly winds in Warsaw on September 29, supporting a daytime maximum near 21°C. This aligns with the market's leading 62% implied probability for 21°C and 27.5% for 20°C, reflecting tight clustering around that range amid minimal precipitation risk and typical late-September insolation. Minor model spread on afternoon peaks accounts for the smaller probabilities on 22°C or 19°C, while historical September averages near 16–18°C provide context for the current mild anomaly. Official updates from national meteorological services will refine the exact maximum before resolution.