Recent official forecasts from the Finnish Meteorological Institute and European models indicate Helsinki's September 2 minimum will likely fall between 12–15°C, with trader consensus tightly split near 14–15°C reflecting small differences in predicted overnight radiative cooling under partly cloudy skies. Light to moderate southwesterly winds and Baltic Sea moderation limit extreme drops, while historical early-September averages near 11.5°C provide baseline context. Model spread on cloud cover and timing of any frontal passage creates genuine uncertainty that keeps probabilities for 12°C and 15°C nearly as high, with colder or warmer outliers remaining low-probability scenarios absent major forecast shifts before resolution.