London weather in December
December is one of the least pleasant months in London: highs of 7°C (45°F) and about 71 mm (2.8 in) of rain on average. Nights average 2°C (36°F) and cloud cover 76% (NASA POWER, 2001–2025 averages). It is the 3rd wettest month of the year and the 2nd coolest. Compared with November, it is cooler and about as wet; January brings highs of 7°C (44°F) and 65 mm (2.6 in) of rain.
Is December a good time to visit London?
least pleasant month Weather score 35/100.
December is one of the least pleasant months for weather in London. For better conditions, consider May–Sep.
Does it rain a lot in London in December?
Some rain is normal: about 71 mm (2.8 in) falls in an average December. It is the 3rd wettest month of the year.
How warm is London in December?
Days average 7°C (45°F) and nights 2°C (36°F).
London weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 7°C (44°F) | 2°C (35°F) | 65 mm | 75% | least pleasant |
| February | 7°C (45°F) | 1°C (34°F) | 54 mm | 75% | least pleasant |
| March | 10°C (50°F) | 2°C (36°F) | 50 mm | 73% | least pleasant |
| April | 14°C (57°F) | 4°C (40°F) | 42 mm | 68% | fair |
| May | 17°C (63°F) | 7°C (45°F) | 55 mm | 71% | best |
| June | 20°C (69°F) | 11°C (51°F) | 56 mm | 72% | best |
| July | 23°C (73°F) | 13°C (55°F) | 60 mm | 69% | best |
| August | 22°C (72°F) | 12°C (54°F) | 66 mm | 72% | best |
| September | 20°C (67°F) | 10°C (50°F) | 44 mm | 68% | best |
| October | 15°C (59°F) | 8°C (46°F) | 73 mm | 73% | fair |
| November | 10°C (51°F) | 4°C (40°F) | 74 mm | 75% | least pleasant |
| December | 7°C (45°F) | 2°C (36°F) | 71 mm | 76% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months