**Forecast models and real-time observations from sources like PredictWind, Yr.no, and WeatherBug indicate a minimum temperature for Kuala Lumpur on September 15, 2026, likely settling between 24–26°C, which underpins the tight market-implied odds favoring 26°C (54%) slightly over 25°C (46%).** In this equatorial climate during the inter-monsoon period, high humidity (often 70–90%) and frequent cloud cover or scattered thunderstorms suppress radiative cooling overnight, keeping the diurnal minimum elevated compared to drier seasons. Hourly data show the lowest readings typically occurring pre-dawn around 24–25°C at standard stations, with minor variations from urban heat islands or exact measurement protocols. Official Malaysian meteorological reports and ensemble forecasts exhibit limited spread, reflecting stable steering patterns and light winds that prevent sharper drops, while traders weigh potential revisions from final overnight readings against historical September baselines near 24–25°C.