Multiple high-res models (ECMWF, GFS consensus) project Paris peaking at exactly 20°C for May 10. This consistent thermal ceiling, supported by no robust advective warming or strong insolation exceeding the threshold, signals a firm 'no'. The 20°C isotherm is a hard forecast limit across ensemble outputs. 95% NO — invalid if official Météo-France reading exceeds 20.0°C.
Multiple high-res models (ECMWF, GFS consensus) project Paris peaking at exactly 20°C for May 10. This consistent thermal ceiling, supported by no robust advective warming or strong insolation exceeding the threshold, signals a firm 'no'. The 20°C isotherm is a hard forecast limit across ensemble outputs. 95% NO — invalid if official Météo-France reading exceeds 20.0°C.