Forecast models from agencies like the Finnish Meteorological Institute place Helsinki's August 5 maximum near 21–22°C, with the narrow spread between these outcomes reflecting uncertainty in afternoon cloud cover, Baltic Sea breeze timing, and any weak frontal passage that could suppress or enhance peak readings by 1°C. Late-summer climatology shows cooling from July peaks, while the Gulf of Finland's maritime influence typically caps inland warming; current surface pressure patterns favor mostly stable conditions without strong advection of warmer air. Traders see limited upside to 23°C or higher given the absence of blocking highs or southerly flow, keeping lower probabilities on extremes while the tight 21–22 contest captures model spread and observational timing.