London Weather: What to Expect This December and Winter 2025

Understanding London’s December Weather Patterns

As December unfolds, London residents and visitors are experiencing typical winter conditions that define this time of year in the British capital. Understanding the weather patterns is crucial for daily planning, whether commuting to work, visiting festive attractions, or preparing for the holiday season ahead.

Daytime temperatures usually reach 8°C in London in December, falling to 2°C at night. This relatively mild winter weather is characteristic of London’s temperate maritime climate, though the dampness and limited daylight can make it feel considerably colder. There are normally 1 hour of bright sunshine each day in London in December – that’s 18% of daylight hours.

Current Conditions and Rainfall Expectations

December in London brings significant precipitation, making waterproof clothing essential for anyone venturing outdoors. Greater London experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 72.3 mm. The persistent wet conditions reflect the Atlantic weather systems that dominate the UK during winter months.

While many dream of a white Christmas, “We are more likely to see snow between January and March than in December”, according to the Met Office. It’s not cold enough for snow at the moment, with temperatures in London and the South East hovering around double digits at the time of writing. The current forecast suggests that wind and rain will continue to dominate the weather pattern through the holiday period.

Looking Ahead: Winter Forecast and Implications

High pressure will probably remain influential across the UK during this period. This means an increasing likelihood of dry weather compared to the winter so far. However, showers or occasional bands of rain are still possible at times, especially later in the period towards January.

For Londoners, this December weather emphasises the importance of layering clothing and carrying umbrellas. The festive atmosphere remains undiminished by the grey skies, with Christmas markets, winter celebrations, and seasonal events continuing regardless of the conditions. The relatively mild temperatures mean that outdoor activities remain feasible, though visitors should prepare for damp and overcast conditions rather than crisp, sunny winter days. As we approach the new year, the possibility of colder weather and even snow increases, making January and February the months to watch for more dramatic winter conditions.