Recent forecast updates from Meteo-France and ECMWF models indicate a maximum temperature of 15–16°C in Paris on May 17, supporting the closely matched market probabilities of 37.5% for 15°C and 31% for 16°C. Persistent Atlantic low-pressure influence has maintained a cool, moist air mass with extensive cloud cover that restricts solar heating, while light variable winds limit vertical mixing and daytime warming. Minor differences in the timing of any brief clearing or slight shifts in wind direction could determine whether the peak reaches 17°C or remains near 14°C. These factors align with typical May variability, where such moderated maxima occur frequently under similar synoptic patterns.