Official temperature observations and final forecast consensus from Environment Canada confirmed a daytime maximum at or below 24°C in Toronto on June 9, driving the overwhelming market-implied probability above 99% for that outcome. Persistent cool, unsettled conditions with cloud cover and showers suppressed daytime heating, consistent with early-month climatological patterns showing below-normal highs for southern Ontario. Model runs aligned closely on this range with minimal spread, leaving little room for upward revisions. Only an unexpected late-day warming spike or measurement adjustment outside standard protocols could have altered resolution, scenarios viewed as highly improbable given the data.