Recent ensemble forecasts from European models indicate a likely peak of 24–26°C in Helsinki on June 21, driven by southwesterly flow advecting mild maritime air under partly cloudy skies with light showers possible. This setup aligns with trader consensus favoring the 24–25°C outcomes, which together hold over half the market probability. Historical June highs average near 18–19°C at the official measurement site, but recent days have trended 2–3°C above normal amid stable high pressure. Key variables differentiating close bins include afternoon cloud timing, boundary-layer mixing depth, and exact frontal passage, with model spread creating genuine uncertainty in the 1–2°C range. Updated high-resolution runs and FMI observations over the next 48 hours will refine these probabilities ahead of resolution.