Current ensemble forecasts from the Finnish Meteorological Institute and ECMWF indicate a daytime maximum of 19°C in Helsinki on May 16, driven by mild southerly advection of warmer Atlantic air beneath a high-pressure ridge and moderate solar insolation under partly cloudy skies. This setup positions the 19°C outcome at near-certain implied probability in the market, consistent with observed midday readings near 16–17°C and historical May climatology around 14–15°C. Subtle model spread on boundary-layer mixing and thin high-cloud timing introduces limited uncertainty, though stronger-than-expected warming or reduced cloud cover could push peaks briefly higher; official hourly data through the afternoon will confirm the exact peak at Helsinki-Vantaa station.