**Forecast consensus from multiple models positions 19–20°C as the most probable range for Helsinki’s daily maximum temperature on August 29, 2026.** Official guidance from the Finnish Meteorological Institute (FMI) and cross-checked sources such as Yr.no, Met Office, and Worldmeteo consistently indicate a high near 19–20°C under mostly cloudy conditions with southeast winds of 5–10 m/s. This aligns closely with the market’s leading implied probabilities (20°C at 56.5%, 19°C at 22.5%). Late-August climatology at 60°N features declining solar insolation and average daily maxima around 18–20°C, providing a stable baseline. Current synoptic setup features a high-pressure influence over Finland with a developing low farther west, resulting in mild, stable flow without strong advection of warmer or cooler air masses. Model agreement is high, with limited spread in predicted maxima and only modest chances of light precipitation that would not substantially alter peak daytime readings. Recent forecast updates through August 28 have shown little change, reinforcing trader confidence in the narrow 19–20°C window while leaving modest room for a 21°C outlier if daytime heating exceeds expectations or a 18°C outcome under heavier cloud cover.