**Real-time observations and forecast model consensus have driven near-certain trader positioning on an 18°C daily maximum for Munich on September 10.** Overcast skies, light easterly to northwesterly winds, and stable high pressure limited daytime heating, with hourly data from sources such as Yr and Meteoprog showing afternoon peaks reaching but not exceeding 18°C. This aligns with the day’s cool, cloudy pattern that kept temperatures below the long-term September average high of 20.5°C. Market-implied odds reflect this tight clustering of official station readings and model runs around that exact threshold. Only an unexpected late-day spike or post-hoc measurement revision at the primary reporting station could alter the outcome, though current data make such shifts improbable.