Recent forecasts from sources including the Finnish Meteorological Institute and international models indicate a September 1 overnight low in Helsinki likely ranging 9–12 °C, driven by moderate southwesterly flow, lingering cloud cover from a frontal passage, and seasonal radiative cooling under clear spells. Ensemble spreads introduce uncertainty around intensification of northerly advection or localized clear-sky conditions that could push minima toward or below 8 °C, supporting the market-implied 46 % probability for that bucket. Historical climatology for the date centers on an 11–12 °C minimum, so current model consensus tilts slightly cooler while remaining within normal late-summer variability. Updated runs ahead of resolution will clarify whether steering patterns favor further cooling.