A proper late-summer day: 24°C and sunshine for Richmond today
22 September 2026 · By Boroughly editorial — AI-assisted, human-reviewed.
September is making a generous exit. Tuesday 22 September brings Richmond one of the finest days of the month, with wall-to-wall sunshine and a high of 24°C — noticeably warmer than the 21°C that characterised much of the recent fine spell.
The Met Office puts the chance of rain at just four per cent, and the UV index reaches 4, which is moderate — enough to warrant sunscreen if you're spending a few hours outside. The overnight low tonight will be a comfortable 15°C, so evenings remain mild.
With the autumn equinox falling today, this is technically the first day of astronomical autumn, which makes a 24°C sunny afternoon feel like something of a parting gift from summer. Richmond Park, the riverside path at Twickenham and Kew Gardens are all well worth an hour or two if plans allow.
The forecast is from the Met Office and was issued on Monday evening. Conditions can shift, so it is worth checking for updates before heading out for anything time-sensitive.