The market consensus for a 19°C high in Cape Town on May 15 stems from official daily maximum readings recorded at primary stations under the South African Weather Service, confirming a peak temperature consistent with late-autumn climatology. Persistent westerly flow from the cooler Atlantic, combined with clear skies and moderate humidity, suppressed typical warming and kept values aligned with historical May averages around 18–20°C. Traders have fully priced in these verified observations, leaving negligible scope for upside resolution unless post-event data revisions or localized microclimate effects emerge—scenarios that official monitoring protocols rarely alter at this stage.