London weather in January
In January, London has an average high of 7 °C45 °F and an average low of 2 °C35 °F, with about 65 mm2.6 in of precipitation. January is the coldest month of the year and ranks 5th for precipitation.
How January compares with other months
Compared with December, January is 0.7 °C1.2 °F cooler on average and drier by 6 mm0.3 in. Compared with February, January is about the same temperature and wetter by 11 mm0.4 in. Daylight lasts about 8.3 hours around the middle of the month. Average relative humidity is 93% and the average cloud amount 75%.
Is January a good time to visit London?
January is not among the most comfortable months by our comfort score: it is cool (average high 7 °C45 °F), nights are cold (average low 2 °C35 °F) and it is fairly wet (65 mm2.6 in). The most comfortable months in London are June–September.
What to wear in January
For London in January, pack a warm coat, layers and closed shoes.
January in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| London | 745 | 235 | 652.6 |
| Bexley | 745 | 235 | 652.6 |
| Slough | 745 | 235 | 682.7 |
| Crawley | 745 | 337 | 783.1 |
| Luton | 643 | 134 | 612.4 |
| Southend-on-Sea | 745 | 337 | 612.4 |
| Reading | 745 | 235 | 702.7 |
| Basingstoke | 744 | 135 | 702.7 |
| Milton Keynes | 643 | 134 | 612.4 |
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 January?
In January the average high in London is 7 °C (45 °F) and the average low is 2 °C (35 °F).
Does it rain a lot in London in January?
On average about 65 mm (2.6 in) of precipitation falls in January; it ranks 5th of the 12 months.
Is January 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 January?
In the middle of January the day in London lasts about 8.3 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is London in January?
The average relative humidity in January is about 93%. This is a long-term average for the whole day.
How cloudy is London in January?
On average about 75% of the sky is covered by cloud in January. 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.