Forecast models indicate a low-pressure system moving into Fennoscandia, with southwesterly winds, extensive cloud cover, and scattered showers or thunderstorms expected overnight into August 31, which should limit nocturnal radiative cooling and support minimum temperatures clustered near 13–16 °C. High humidity and persistent marine influence from the Baltic further moderate overnight drops compared with historical late-August averages around 12 °C. Recent model runs show limited spread on the exact low, reflecting uncertainty in the timing of any partial clearing that could allow slightly greater cooling versus sustained overcast conditions that hold readings higher. Traders appear to price this narrow range of outcomes most heavily because official guidance from agencies such as the Finnish Meteorological Institute and ensemble forecasts converge on mild, unsettled conditions rather than a clear-air radiational minimum.