**Clear skies and light winds under a high-pressure ridge are allowing significant overnight radiative cooling in Wellington, with official forecasts from MetService and international models converging on a minimum near 8–9°C.** Multiple sources, including WeatherBug and Weather Atlas, project lows around 47°F (8°C) or 9°C for September 29 amid dry conditions and northerly to variable flow easing to calm. This setup favors temperatures at the lower end of seasonal norms for late spring, though model spread and local microclimate effects near the harbor or airport station introduce uncertainty between 6°C and 7°C resolution thresholds. Recent days have seen similar minima of 5–7°C under comparable high-pressure influence, supporting the tight market-implied odds clustered around those values. Updated observational data from the overnight period or revised model runs will likely refine the final recorded low.