Another hot one today: 31°C in Barnes with a UV index of 8
9 August 2026 · By Boroughly editorial — AI-assisted, human-reviewed.
After a week of fine weather, Sunday is shaping up to be another warm day in Barnes — though a little cloud cover will take the edge off what would otherwise be full summer sunshine.
The Met Office is forecasting a high of 31°C and a low of 19°C overnight, with just a 4% chance of rain. The UV index reaches 8, which is classed as very high, meaning sun protection is strongly recommended for anyone spending time outdoors — especially children.
The partly cloudy conditions may actually make the riverside and the Common more comfortable for an afternoon out than the cloudless days earlier this week. Barnes Common, the riverside path between Hammersmith Bridge and Chiswick Bridge, and the grounds around St Paul's School are all popular spots when the thermometer climbs.
If you're heading out, it's worth carrying water and applying a high-factor sunscreen before you leave. The evening low of 19°C means it stays pleasantly warm well into the night. Full forecast from the Met Office.