Recent forecasts from global models and regional sources indicate a highest temperature in Warsaw on September 1, 2026, most likely between 20–24°C, driven by typical late-summer transition patterns with moderating Atlantic air masses and possible weak frontal passages. Consensus high temperatures cluster near 21–23°C amid partly cloudy skies and light rain chances, consistent with historical September averages around 22°C. Ensemble spread arises mainly from uncertainty in cloud cover, timing of any showers, and boundary-layer mixing that could suppress or enhance daytime peaks by 1–3°C. No strong blocking highs or cold outbreaks are projected, keeping extremes below 26°C or above 18°C unlikely in current runs. Updated model guidance expected within 24–48 hours will refine resolution criteria tied to official station maxima.