Trader sentiment for San Francisco's March 25 peak temperature reflects model divergence on marine layer persistence and high-pressure ridge strength, with 70°F+ odds at 25.5% buoyed by ECMWF's warmer bias amid offshore flow potential, while 68-69°F (17%) and cooler bins like 54-55°F (13.5%) gain from GFS onshore wind forecasts trapping coastal stratus clouds. National Weather Service guidance points to partly cloudy skies and light winds, but microclimate effects at SFO—where observations resolve—often cap highs below 65°F in March (historical average 62°F). Key differentiator: afternoon boundary layer mixing; insufficient solar heating under lingering fog favors sub-60°F, per recent NOAA soundings, with final NWS update tomorrow sharpening probabilities.