Hot and mostly cloudy today in Chiswick — 33°C with UV index 9
6 July 2026 · By Boroughly editorial — AI-assisted, human-reviewed.
Sunday is shaping up to be a genuinely hot day in Chiswick, with the Met Office forecasting a high of 33°C and a low overnight of 19°C. Cloud cover will keep it from feeling like peak sunshine, but the UV index of 9 is classed as very high — meaning sun protection is strongly advisable even on an overcast day.
The chance of rain is just 5%, so there is little to worry about on that front. However, heat of this level can be uncomfortable, particularly for the elderly, young children and anyone exercising outdoors. It is worth keeping well hydrated and seeking shade during the middle of the day.
Chiswick's riverside paths and Dukes Meadows are likely to be busy with residents making the most of the weekend warmth. If you are heading out, earlier morning or early evening walks will be far more pleasant than the mid-afternoon heat.
The Met Office UV forecast recommends SPF 30+ sunscreen, a hat and sunglasses for anyone spending time outdoors today. See the full local forecast at Met Office.