**Recent official forecasts from MetService and other sources position 11–12°C as the most probable range for Wellington’s maximum temperature on June 29, 2026, aligning closely with the market’s leading outcomes (12°C at 50%, 11°C at 22%).** Wellington’s winter climate features modest daytime highs near the long-term June average of 12–13°C, moderated by its exposed coastal location and frequent southerly flows from the Southern Ocean that advect cooler maritime air. Current guidance indicates a few showers clearing on the 29th under southerly winds, which typically limit daytime warming by several degrees through cloud cover, wind mixing, and reduced insolation. NIWA’s April–June seasonal outlook assigns the highest probability (45%) to near-average temperatures for the Wellington region, providing a climatological baseline that supports the market-implied distribution. Model consensus and short-range updates show limited scope for significant warming or cooling, keeping probabilities concentrated around 11–12°C while assigning low odds to outliers above 14°C or below 10°C. Traders appear to be weighting the latest MetService extended forecast and expected synoptic pattern heavily, with uncertainty mainly around exact shower timing and wind strength.