Official meteorological observations from primary urban stations in São Paulo recorded a daily maximum temperature of exactly 24°C on June 10, aligning with the market's resolution criteria and producing the 100% implied probability for that outcome. June climatology for the region typically features highs near 22°C under the influence of the South Atlantic subtropical high, with limited diurnal warming due to urban heat island effects and frequent cloud cover or light precipitation. This measured value fits within the observed range for early winter conditions without requiring anomalous synoptic patterns. New data releases or station revisions remain the only realistic scenarios that could alter resolution, though such adjustments are rare once preliminary reports are issued.