Chiswick forecast to hit 36°C today — hottest of the year, storm possible
24 June 2026 · By Boroughly editorial — AI-assisted, human-reviewed.
Tuesday looks set to be the hottest day of the year in Chiswick, with the Met Office forecasting a high of 36°C and a UV index of 9 — firmly in the "very high" band. The overnight low is expected to be 22°C, meaning little relief even after dark.
The forecast also flags a possible storm later in the day, with a 46% chance of rain. Residents should be prepared for conditions to shift quickly from intense sunshine to heavy downpours, potentially with thunder. The combination of extreme heat and a possible storm makes this a day to keep a close eye on the forecast. Full details are on the Met Office website.
A UV index of 9 means unprotected skin can burn in as little as 15 minutes. The NHS recommends staying in the shade between 11am and 3pm, drinking plenty of water and keeping an eye on elderly or vulnerable neighbours who may struggle in the heat.
Given the simultaneous disruption to the District Line and the Mildmay Line, the heat is likely to make travel more uncomfortable for commuters today. If your journey can wait, this may be a day to work from home or travel early.