Ensemble model runs from MetService and international guidance point to a daily maximum near 14 °C in Wellington on May 17, placing that outcome at the front of trader pricing. Late-autumn conditions, including moderate southerly flow across Cook Strait and limited daytime heating under partly cloudy skies, align closely with the station’s climatological average of 14–16 °C for mid-May. Recent overnight temperatures in the 8–10 °C range and a lack of strong northerly advection have kept warming potential modest, while forecast uncertainty remains low enough to favor 14 °C over the 13 °C or 15 °C brackets. Final official observations from the Wellington Airport station will determine resolution once the day concludes.