Official meteorological observations from the Finnish Meteorological Institute confirm that Helsinki’s maximum temperature on May 16 reached 19 °C, anchoring the market-implied probability for this exact threshold at essentially 100 %. Synoptic station data and quality-controlled hourly readings show no exceedance of the next higher bin, consistent with the prevailing cool northerly flow and limited daytime insolation under partly cloudy skies. Historical May climatology for the Helsinki region places average daily maxima near 15–17 °C, so the observed value represents a modest positive anomaly yet remains well below thresholds that would shift the distribution. Minor post-processing adjustments to the official record remain possible but are statistically rare once preliminary data have been released.