National Weather Service observations confirm that San Francisco's maximum temperature on June 1 reached at least 68°F, driving the market-implied probability for this outcome to 100%. This result aligns with early-June climatology at downtown stations, where average highs typically fall in the mid- to upper 60s, and reflects specific atmospheric conditions including a shallow marine layer and modest offshore flow that limited Pacific cooling. Ensemble model guidance had projected 68–71°F under these patterns. Resolution depends strictly on the official daily climatological report, so revisions to station data or measurement methodology remain the only realistic factors that could alter the outcome.