Hot and cloudy in Chiswick today — 31°C with a very high UV index
7 July 2026 · By Boroughly editorial — AI-assisted, human-reviewed.
Monday brings another hot day to Chiswick, with temperatures expected to reach a high of 31°C and not dipping below 21°C overnight. Cloud cover will keep it from feeling as intense as a full-sun day, but the UV index is forecast at 9 — classed as very high — meaning sun protection remains important even without direct glare.
The chance of rain is just 5%, so outdoor plans are unlikely to be affected. Those heading to Dukes Meadows, the riverbank or any of Chiswick's parks should be comfortable for most of the day, though the heat and humidity may build through the afternoon. The Met Office forecast rates conditions as fine and hot.
With UV at this level, the NHS recommends SPF 30 or higher sunscreen, sunglasses and a hat for time spent outdoors, particularly between 11am and 3pm when UV intensity peaks. Staying well hydrated is especially worth keeping in mind if you are cycling or running along the river path. This is the third consecutive day of temperatures above 29°C in Chiswick, so heat fatigue is a genuine consideration for vulnerable residents.