Singapore's climatological mean for April maximum temperatures consistently ranges 31-32°C. A high of 25°C or below would necessitate an extreme, sustained advective cooling event or unprecedented suppression of diurnal heating by a persistent, heavy rainfall shield, which is statistically improbable for the entire day. The tropical maritime airmass typical for this period ensures daily highs significantly above 25°C. This is a clear mispricing of tropical climatology. 98% NO — invalid if a major, unprecedented cold surge impacts SEA on April 27.
