Forecast consensus from models and agencies such as the Finnish Meteorological Institute and supporting services points to a daily maximum of 15°C in Helsinki on October 2 under clear to partly cloudy skies with light southerly winds, consistent with observed hourly peaks reaching but not surpassing that threshold amid stable high pressure. This drives the near-certain market-implied probability for 15°C, reflecting trader assessment of verified observational data and short-range model agreement rather than longer-term projections. A realistic challenge could arise from localized measurement discrepancies at official stations, timing of the absolute peak, or rapid adjustments in final model runs if unexpected cloud cover or advection alters the surface energy balance.