**Current forecasts from multiple models point to an overnight minimum around 7–9 °C in Helsinki under predominantly clear skies and moderate westerly winds of 4–6 m/s, producing the tight clustering of market-implied odds around 6–8 °C.** Radiative cooling overnight is the dominant factor, enhanced by low cloud cover and falling dew points, yet the steady onshore flow from the Baltic prevents deeper drops that would favor 4 °C or below. Rising surface pressure and dry air further limit extreme minima while keeping the floor near the long-term October average low of roughly 6 °C. With the trading day still open and final observations pending from official stations, small revisions in the evening model runs or local micro-climate effects could shift the exact recorded low within the narrow 4–8 °C band that dominates current sentiment.