Forecast models from the Finnish Meteorological Institute and supporting guidance indicate a daytime maximum of 20–21°C for Helsinki on August 8, aligning with the market’s heaviest weighting on those outcomes. This reflects typical late-summer conditions in southern Finland, where average August highs reach roughly 19–20°C amid moderating Atlantic flow and limited solar heating. Recent model runs show stable southwesterly winds and scattered cloud cover suppressing further warming, with only modest ensemble spread around the central forecast. No significant warm-air advection or clear-sky development has emerged in the past 48 hours to shift expectations higher. Traders are therefore pricing the narrow 20–21°C band as the most probable resolution range ahead of final observations.