**Current forecasts for Wellington, New Zealand, on September 1, 2026, indicate a daytime high near 12–13°C and an overnight minimum typically in the 6–8°C range, with trader-implied probabilities spread across multiple outcomes reflecting genuine forecast uncertainty near the seasonal transition.** Wellington’s coastal location introduces strong marine moderation from the surrounding ocean and Cook Strait, limiting radiative cooling and keeping overnight lows from dropping sharply. Key differentiating factors include wind speed and direction—northwesterlies or strong southerlies enhance mixing and raise minima, while lighter winds under clearer skies allow greater surface cooling toward the lower end of the distribution. Model consensus shows mostly sunny to partly cloudy conditions with moderate northwest flow, supporting a most-likely minimum around 7–8°C, yet small shifts in cloud cover, timing of any weak frontal passage, or local sheltering effects can easily move the realized low by 1–2°C. Historical early-September averages place typical minima near 7–8°C, providing context for the current setup. With the market showing no dominant outcome and elevated probabilities on both milder (12°C+) and cooler (5–7°C) buckets, traders appear to be pricing in the narrow but non-zero range of model spread and local variability that commonly affects precise minimum-temperature resolution in this windy, maritime environment. Updated official guidance from MetService or equivalent agencies over the next 24–48 hours will be the primary catalyst for any repricing.