Recent numerical weather prediction model runs from the Finnish Meteorological Institute and supporting ensembles indicate a likely daily maximum near 22–23°C in Helsinki on June 18, driven by modest southerly flow and limited cloud cover under a weak high-pressure ridge. This aligns with early-summer climatology, where average June highs reach about 19°C, but current guidance shows a modest positive anomaly without strong warm-air advection or clear-sky amplification that would push readings to 25°C or higher. Ensemble spread and typical 48-hour forecast uncertainty around frontal timing and boundary-layer mixing keep the distribution centered on 21–23°C, with lower probabilities assigned to cooler or much warmer outcomes. Updated model cycles and any shifts in the 500 hPa pattern over the next 24–48 hours will be the key catalysts for further market movement.