Recent forecasts from the UK Met Office and ensemble models show a high-pressure ridge building over southern England, with light westerly flow and largely dry conditions expected to limit cloud cover and support afternoon temperatures near 22–23°C on September 1. This consensus underpins the closely matched 36% and 34.5% market-implied probabilities for those outcomes, reflecting typical early-September climatology around 20–22°C but with modest warming from residual late-summer warmth and clear spells. Key variables differentiating the bins include exact timing of any residual showers, boundary-layer mixing, and urban heat effects in central London; model spread remains modest at this short range, with official updates likely to refine the peak reading before resolution.