United Kingdom in September: where is it warmest?
In September, London is the warmest place with 19 °C by day, Edinburgh the coolest with 15 °C. 1 of 2 destinations have good holiday weather.
All destinations in September, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
United Kingdom in September: quick answers
United Kingdom in September: where is it warmest?
The warmest places in September are London (19 °C) and Edinburgh (15 °C).
United Kingdom in September: where is the sea warmest?
The sea is warmest at Edinburgh (14 °C).
United Kingdom in September: where is the weather best?
The best holiday weather in September – warm, sunny and dry – is in London and Edinburgh.
United Kingdom month by month
United Kingdom: weather & best time to visit
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)