Recent ensemble forecasts from the European Centre for Medium-Range Weather Forecasts (ECMWF) and Finnish Meteorological Institute models indicate overnight lows near 11–12°C for Helsinki on August 25, with daytime maxima around 19°C under partly cloudy conditions. Trader sentiment reflects substantial ensemble spread driven by uncertainty in cloud cover and boundary-layer winds: clearer skies would enhance radiative cooling and favor minima of 7°C or below, while increased northerly flow or marine influence from the Baltic Sea could hold temperatures closer to 11–13°C. Climatological baselines show late-August minima typically declining toward 9–10°C, yet current model runs exhibit notable divergence on timing of any high-pressure ridge. Updated short-range guidance and next ECMWF cycle will likely refine these probabilities ahead of the 24-hour resolution window.