Recent forecast model runs from the Finnish Meteorological Institute and international ensembles indicate highest temperatures in Helsinki on August 22 will most likely reach 18–20 °C under mild late-summer conditions influenced by south-westerly flow and variable cloud cover. Baltic Sea surface temperatures near 17 °C continue to moderate extremes, while scattered showers and weak pressure gradients limit strong diurnal warming or rapid cooling. Market-implied odds cluster tightly around these values because ensemble spreads remain modest and no major synoptic shift—such as a pronounced ridge or incoming Arctic air—appears imminent before resolution. Traders weigh the balance between slight model consensus for 19 °C peaks and the possibility of marginally cooler readings if persistent low cloud develops.