**Trader consensus has converged on 16°C as the highest temperature in Wellington on October 15, 2026, reflecting near-certainty from aggregated station data.** Hourly observations from Wellington-area stations recorded a daytime peak of 16–17°C under northerly flow, with afternoon readings stabilizing near 16°C before cooler southerly winds and rain arrived in the evening. This aligns with model consensus from sources such as GFS and local analyses showing mild spring conditions without significant warming aloft or clear-sky amplification. Official verification thresholds for daily maximum, typically drawn from calibrated automatic weather stations, support this outcome over nearby values. The only realistic challenges would involve post-hoc data revisions, station-specific adjustments, or an unrecorded spike exceeding measurement error margins, though late-day trends make such shifts improbable.