**Short-term weather models currently favor a daily maximum of 10–11°C for Wellington on August 6, 2026, underpinning the market’s heavy weighting toward those outcomes.** August climatology in Wellington (austral winter) features average highs near 12–13°C, with frequent southerly flows and wind-driven mixing that often suppress daytime peaks. Recent forecasts from multiple sources, including timeanddate and Met Office guidance, indicate highs of 9–10°C on the 6th under scattered cloud and light-to-moderate winds, consistent with cooler-than-average conditions signaled in the NIWA seasonal outlook for the Wellington region. These model runs emphasize the influence of transient high-pressure ridging and limited northerly advection, reducing the likelihood of reaching or exceeding the long-term mean. Traders appear to be pricing the consensus of operational forecasts and ensemble guidance, which show low dispersion around the 10–11°C range two days ahead. Key variables that could shift probabilities include any last-minute model adjustments to wind direction or cloud cover before the observation window closes.