Another sunny day in Chiswick — 29°C and a UV index of 9
17 July 2026 · By Boroughly editorial — AI-assisted, human-reviewed.
Thursday is shaping up to be another genuinely hot day in Chiswick, with the Met Office forecasting wall-to-wall sunshine, a high of 29°C and an overnight low of 17°C. The chance of rain is just 2%, so there is very little standing between residents and a full summer day.
The UV index of 9 is classified as very high, meaning unprotected skin can burn in as little as 15–20 minutes around midday. Sunscreen of at least SPF 30, a hat and staying in the shade between 11am and 3pm are all strongly advised, particularly for children and fair-skinned adults.
Chiswick House and Gardens, Hogarth's House grounds and the Thames Path towpath between Strand-on-the-Green and Kew Bridge all make for pleasant spots during the cooler morning and early-evening hours. Anyone planning outdoor exercise is better off going before 10am or after 5pm.
The forecast looks settled for at least the rest of the week. Full forecast from the Met Office.