**Current forecasts for Moscow on September 3, 2026, indicate a minimum temperature most likely in the 13–15°C range, driven by a cooling trend after warmer conditions on September 1.** Multiple models project overnight lows near 13–14°C under mostly cloudy skies with light southwesterly winds and scattered light rain, limiting clear-sky radiative cooling. Daytime highs are expected around 19–21°C before temperatures fall after sunset. The near-even split in market-implied probabilities between the 8°C-or-below and 18°C-or-higher outcomes (both ~46%) reflects ongoing model uncertainty and trader caution two days ahead of resolution. Ensemble spreads in temperature forecasts remain notable for this timeframe, particularly regarding exact cloud cover, wind speed, and any late-arriving frontal passages that could alter nocturnal cooling rates. Historical early-September climatology for Moscow shows typical overnight minima around 10–14°C, providing context for why traders assign meaningful probability to moderate outcomes clustered near 10–14°C (each ~25–26%). Key differentiating scientific factors include the strength of the nocturnal boundary layer, surface moisture from recent precipitation, and the precise timing of any wind shifts—variables that numerical weather prediction models resolve differently at short lead times. Updated model runs and official guidance from sources such as the Hydrometeorological Center will likely narrow these ranges as September 3 approaches.