Forecast models from multiple meteorological sources, including GFS-based outputs and regional analyses, indicate a daytime maximum of 23°C for Paris on October 3, 2026, under a stable high-pressure ridge with northeasterly flow at 5–10 km/h. Partly cloudy to overcast conditions with minimal precipitation risk limit both radiative warming and cooling, producing a peak consistent with late-summer rather than typical October climatology (historical average high near 17°C). Hourly trends show temperatures rising from morning lows around 12–14°C to afternoon values of 22–23°C before evening decline, aligning with the market’s heavy weighting toward 23°C (68% implied probability) and modest support for 22°C or 24°C. No significant model divergence or frontal passage has emerged in the latest runs to alter this central tendency.