Recent forecasts from the Finnish Meteorological Institute and ensemble models indicate a cool, mostly cloudy pattern with possible light rain or drizzle for Helsinki on June 13, keeping daytime maxima centered around 15–17 °C and limiting afternoon warming. This aligns with the market’s heaviest weighting on 17 °C and 18 °C outcomes, as traders incorporate the latest model runs showing modest southerly flow but persistent marine influence from the Baltic. Key variables include the exact timing of any brief clearing that could push peaks toward 19 °C versus continued cloud cover or showers capping temperatures near 15 °C, plus the influence of a nearby low-pressure system that has kept recent days below seasonal norms of roughly 16–18 °C. Model spread and the short lead time sustain the broad probability distribution.