Another hot day in Chiswick today — 35°C and UV index 8
9 July 2026 · By Boroughly editorial — AI-assisted, human-reviewed.
Wednesday is set to be the hottest day of the current spell in Chiswick, with the Met Office forecasting a high of 35°C and an overnight low of 23°C — meaning there is little respite even after dark. The sky will be partly cloudy, which may temper the intensity slightly, but the UV index of 8 remains in the very high category and sun protection is strongly advised for any time spent outdoors. The full forecast is available from the Met Office.
With temperatures this high, a few practical things are worth bearing in mind. The NHS recommends staying out of direct sun between 11am and 3pm, keeping rooms shaded and drinking water regularly. Chiswick residents with elderly or vulnerable neighbours may want to check in on them — heat can be dangerous quickly for those who live alone or have underlying health conditions.
For anyone looking for shade and space, Chiswick House grounds and Dukes Meadows both offer tree cover along the riverside. If you are travelling, the District Line was already experiencing disruption yesterday evening, so allow extra time and carry water for any journey. The warm weather looks set to continue through the rest of the week.