**Trader consensus on London October precipitation remains evenly distributed across bins because long-range outlooks show a dry early-month period giving way to more unsettled conditions later, with high uncertainty around totals.** The Met Office and seasonal models indicate an increased likelihood of above-average rainfall for the UK autumn overall, driven by a strengthening El Niño that favors wetter, milder patterns and heightened storm risk from the Atlantic. Early October is expected to start under high pressure with below-normal precipitation, but a shift toward low-pressure systems around mid-month raises the potential for heavier rain and strong winds. Historical October averages near 70–90 mm, yet interannual variability and diverging model signals on the timing and intensity of Atlantic systems keep implied probabilities clustered between 13–15% across the full range of outcomes. Updated forecast runs closer to the month’s start will likely narrow the distribution.