Latest National Weather Service and NOAA model runs indicate a strong likelihood of San Francisco reaching at least 66°F on May 22, driven by a temporary ridge of high pressure that is suppressing the usual marine layer and allowing greater solar heating along the coast. Ensemble guidance shows afternoon temperatures climbing into the mid-to-upper 60s under mostly sunny skies, with light onshore winds limiting afternoon cooling compared to typical May climatology. This shift aligns with the market-implied 78.5% odds for 66°F or higher while keeping lower brackets at single-digit probabilities. Traders are monitoring the next NWS forecast update for any adjustments to the thermal profile or wind patterns ahead of tomorrow’s resolution.