London weather in December
In December, London has an average high of 8 °C46 °F and an average low of 3 °C37 °F, with about 71 mm2.8 in of precipitation. It is the 10th warmest month of the year and ranks 3rd for precipitation.
How December compares with other months
Compared with November, December is 2.5 °C4.6 °F cooler on average. Compared with January, December is 0.7 °C1.2 °F warmer on average and wetter by 6 mm0.3 in. Daylight lasts about 7.9 hours around the middle of the month. Average relative humidity is 94% and the average cloud amount 76%.
Is December a good time to visit London?
December is not among the most comfortable months by our comfort score: it is cool (average high 8 °C46 °F), nights are cold (average low 3 °C37 °F) and it is fairly wet (71 mm2.8 in). The most comfortable months in London are June–September.
What to wear in December
For London in December, pack a warm coat, layers and closed shoes.
December in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| London | 846 | 337 | 712.8 |
| Bexley | 846 | 337 | 712.8 |
| Slough | 846 | 337 | 742.9 |
| Crawley | 846 | 439 | 843.3 |
| Luton | 744 | 235 | 662.6 |
| Southend-on-Sea | 846 | 338 | 692.7 |
| Reading | 745 | 337 | 752.9 |
| Basingstoke | 745 | 236 | 752.9 |
| Milton Keynes | 744 | 235 | 662.6 |
Other months in London
- January7 °C45 °F / 2 °C35 °F
- February8 °C46 °F / 1 °C35 °F
- March10 °C51 °F / 2 °C36 °F
- April14 °C57 °F / 5 °C40 °F
- May17 °C63 °F / 8 °C46 °F
- June21 °C69 °F / 11 °C52 °F
- July23 °C73 °F / 13 °C55 °F
- August23 °C73 °F / 13 °C55 °F
- September20 °C68 °F / 10 °C50 °F
- October15 °C60 °F / 8 °C46 °F
- November11 °C51 °F / 5 °C40 °F
- December8 °C46 °F / 3 °C37 °F
Frequently asked questions
How warm is London in December?
In December the average high in London is 8 °C (46 °F) and the average low is 3 °C (37 °F).
Does it rain a lot in London in December?
On average about 71 mm (2.8 in) of precipitation falls in December; it ranks 3rd of the 12 months.
Is December the warmest month in London?
No. The warmest month in London is July, with an average high of 23 °C (73 °F). The coldest month is February, with an average low of 1 °C (35 °F).
How long is the day in London in December?
In the middle of December the day in London lasts about 7.9 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is London in December?
The average relative humidity in December is about 94%. This is a long-term average for the whole day.
How cloudy is London in December?
On average about 76% of the sky is covered by cloud in December. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.