National Weather Service model consensus and recent surface observations point to a daytime high of 64–65°F at San Francisco International Airport today, driven by persistent onshore flow that maintains the marine layer while permitting only partial stratus burn-off beneath building high pressure. West winds of 15–20 mph, with gusts higher, suppress afternoon warming and hold readings below the May climatological average of 67°F, supporting the 43% market-implied probability for the 64–65°F bin. Lingering low clouds or thicker advection could limit the peak to 62–63°F, while clearer intervals allow a narrower window for 66–67°F. Hourly updates from official monitoring stations will refine these ranges through the afternoon as resolution nears.