**Trader sentiment for the lowest temperature in Wellington on August 24 centers on a possible cold snap amid near-average winter conditions, with 5°C or below holding the highest implied probability at 40%.** Current MetService and international model guidance point to a high-pressure system over the North Island promoting clearer skies and lighter winds, which could enhance overnight radiative cooling and push minimums lower than the seasonal average low of roughly 7–9°C. NIWA’s June–August 2026 outlook assigns the highest likelihood to near-average temperatures but notes a substantial chance of below-average readings in central regions, consistent with recent early-August observations that included isolated lows near 3–5°C. Southerly airflow episodes remain the key variable that could deliver colder air masses, while the absence of strong northerlies or cloud cover would favor the colder bins. Forecast updates from MetService and NIWA over the next 24 hours, particularly refinements to overnight minimum guidance, represent the primary near-term catalysts likely to shift these market-implied odds.