Recent forecast models from the Finnish Meteorological Institute and international agencies show overnight lows in Helsinki for August 21 clustering near 12–14°C under partly cloudy skies and light southwesterly winds, supporting the market's emphasis on bins from 11–14°C. Typical late-August climatology features average minimums of 11–13°C as seasonal cooling accelerates, with reduced solar input and moderating Baltic Sea influence keeping radiative losses in check. Light winds and cloud cover limit surface cooling compared to clearer, calmer nights that could push readings toward 8–10°C. Updated model consensus has stabilized around these values, though minor spreads in ensemble runs and station-specific measurement criteria (official FMI Helsinki-Vantaa or downtown site) sustain the 59% implied probability on 11°C while capping tail risks below 8°C. No major synoptic shifts or cold-air advection are indicated in the latest guidance.