**Forecast models indicate a minimum temperature for Munich on September 21 likely falling between roughly 7–11°C, with notable uncertainty around the exact value driving closely matched market probabilities.** Recent surface observations show a ridge of high pressure building across southern Germany, promoting northwest flow and gradual clearing after earlier cloudiness and light showers on September 20. This setup favors radiational cooling overnight under partly to mostly clear skies, with light winds (generally 2–4 m/s) and dew points near 9–11°C limiting extreme drops but still allowing temperatures to fall into the single digits Celsius. Model consensus from GFS and other guidance points to lows around 8–11°C (roughly 46–52°F), consistent with the September climatological average low of ~9.4°C but potentially cooler if skies clear more fully than expected. Key variables differentiating outcomes near 7°C versus 10–11°C or higher include the precise timing and extent of cloud cover (which traps heat), wind speeds (calmer conditions enhance cooling), and any subtle warm-air advection. Persistent low clouds or higher moisture could keep the minimum closer to 11°C or above, while rapid clearing would favor the lower end of the range. Traders appear to weigh these forecast nuances and model spreads heavily, resulting in near-even implied probabilities across the 7°C-or-below, 11°C, and 14°C buckets. Updated model runs and observational data through the evening of September 20 will likely refine the expected minimum before resolution.