Recent forecasts from multiple models, including those aligned with Finnish Meteorological Institute guidance, indicate Helsinki's minimum temperature on September 27 will likely range between 9–11°C under clearing skies and light westerly winds, following a period of rain and southerly flow on September 26. This positions the outcome near the middle of the distribution, where historical September 27 lows average 7.5°C but recent years have shown greater variability tied to high-pressure building and radiative cooling potential. Trader balance between 3°C-or-below and 13°C-or-higher outcomes at 47.5% each reflects uncertainty in exact overnight minimums, driven by small shifts in cloud cover, wind speed, and model spread on the final steering pattern. Updated runs from agencies like NOAA and ECMWF over the next 48 hours will likely resolve the primary variables affecting boundary-layer cooling.