Recent ensemble guidance from GFS and ECMWF shows a weak frontal boundary approaching from the west, increasing cloud cover and bringing a modest chance of light showers or drizzle on September 4, which limits daytime heating compared with the clearer conditions of the prior two days. Surface winds shifting westerly to southwesterly at 10–15 kt will enhance mixing while a gradual pressure fall to near 1010 hPa supports slightly cooler boundary-layer temperatures. Model spread centers the daily maximum between 20–22 °C, with 21 °C favored in most runs because thicker low- and mid-level cloud reduces net shortwave radiation by roughly 20–30 %. Any delay in cloud arrival or lighter precipitation could allow a brief 22–23 °C spike, while faster cooling or heavier rain would cap the peak nearer 20 °C. New model cycles and updated observations over the next 48 hours remain the key catalysts for shifts in trader positioning.