Recent European heatwave conditions, driven by persistent high-pressure systems and clear skies over western France, have elevated overnight minimum temperatures in Paris well above the July climatological average of 15–17°C. Météo-France guidance for July 10 points to morning lows near 20–22°C under light winds and limited nocturnal cooling, consistent with the market’s tight clustering around these values. Urban heat-island effects and measurement protocols at official stations further constrain downside risk, while any increase in cloud cover or a slight shift in steering flow could allow marginally lower readings. Updated model runs and the next official forecast briefings remain the key near-term catalysts for shifts in trader-implied probabilities.