Recent official observations from Météo-France and European forecast models show Paris morning temperatures rising from overnight lows of 8–10°C, with afternoon peaks stabilizing in the mid-teens Celsius under mostly cloudy skies and limited solar heating. This meteorological setup underpins the market’s 99.5% implied probability for a 16°C daily maximum, consistent with climatological norms for mid-May where suppressed instability has kept readings below the typical 18°C average high. Traders are weighting the consensus across updated model runs favoring 15–17°C, with resolution hinging on precise peak timing before any late-day clearing. A brief burst of stronger insolation or unexpected wind shift could nudge readings to 17°C, though current conditions make significant deviation unlikely before markets close.