Temperature In London In January 2025. London 7 day weather forecast including weather warnings, temperature, rain, wind, visibility, humidity and uv. With nearly 8 hours of daylight, visitors can explore the city's iconic.

January, with average temperatures reaching a high of 6.8°c (44.2°f) and a low of 2.2°c (36°f), is the coldest month. It features all historical weather data series we have available, including the london temperature history for 2025.