Current forecast guidance from NOAA and other models points to a Seattle overnight low near 48–52°F on October 15 under mostly clear skies, light northerly winds, and high pressure that supports moderate radiative cooling without strong cold-air advection. These conditions align closely with the long-term average low of about 47°F while remaining well above the 35°F record, yet small differences in cloud timing, wind speed, or station-specific microclimates can easily shift the official minimum across several degree bins. This inherent forecast spread and measurement variability explain why trader-implied probabilities remain evenly distributed among the 46–59°F ranges rather than concentrating on any single outcome.