Recent Met Office and model guidance for September 2 point to a mostly cloudy day with southwesterly flow, light morning rain risk, and afternoon brighter spells that limit surface heating. Official forecasts converge on a maximum of 21–23 °C, with many runs peaking near 21 °C under widespread cloud and modest wind speeds that enhance mixing and suppress further warming. Early-September climatology places the London mean daily maximum near 20–22 °C, so current conditions align closely with the seasonal norm rather than any anomalous ridge or warm advection. Updated model runs released overnight on September 1 reinforced the 21 °C outcome as the modal solution, prompting the market’s heavy weighting toward that bin while leaving modest probability for a 22 °C nudge if afternoon sun breaks through more than expected. No major forecast shifts have occurred in the past 24 hours to alter this consensus.