**Forecast models and real-time observations for October 8, 2026, show San Francisco overnight lows clustering in the mid-50s°F under clear to partly cloudy skies, with radiative cooling and light westerly winds from the Pacific moderating temperatures near the historical average low of 55°F.** Recent days featured similar patterns, with observed lows of 54–62°F amid a stable high-pressure regime and minimal marine layer influence, keeping conditions dry. The closely matched market probabilities for 50–51°F, 54–55°F, and 62–63°F reflect uncertainty in the precise minimum, driven by factors such as exact measurement site (e.g., downtown vs. SFO airport), timing of the daily low, and minor variations in cloud cover or wind that affect nocturnal cooling rates. Official guidance from agencies like the NWS emphasizes these variables, with no major shifts in model consensus noted in the past 24–48 hours.