Recent ensemble forecasts from European and global models highlight a moderating Atlantic flow over western Europe, with a broad trough keeping daytime maxima in Paris on May 18 clustered between 15–17 °C. This pattern stems from limited daytime heating under variable cloud cover and light winds, yielding modest diurnal ranges around the seasonal climatological mean of roughly 18 °C. Trader consensus currently assigns the highest implied probability to 16 °C, reflecting the tight spread across guidance and the inherent uncertainty in boundary-layer mixing and exact timing of any breaks in overcast conditions. Updated model runs through the weekend will refine whether a brief ridge can push readings slightly higher or whether persistent moisture caps the peak.