January brings consistently chilly conditions to England’s capital city, with temperatures remaining relatively stable throughout the month. Londoners can expect daily high temperatures to hover around 47°F (8°C), with little variation from the beginning to the end of the month. Historical weather data from 1991-2020 confirms this pattern, with London’s Greenwich area recording average highs of 47°F, while Kew Gardens experiences slightly warmer conditions at the same temperature range.
January in London delivers consistent chill, with daily highs around 47°F (8°C) throughout the month, as confirmed by historical data.
Nighttime brings a noticeable drop, with average low temperatures settling between 39°F and 40°F (3-4°C). These lows rarely fall below 30°F (-1°C) or climb above 49°F (9°C), providing predictable conditions throughout January. Greenwich specifically records an average low of 38°F (3°C), which aligns with broader London patterns. The United Kingdom as a whole experiences similar January temperature patterns with average daily lows of 1 degree Celsius.
Temperature extremes do occur, with recorded minimums reaching as low as 26°F (-3°C) in documented weather history. The overall mean temperature for London in January sits at approximately 40.6°F (4.8°C), making it the coldest month of the year. Recent winter seasonal averages for 2024/25 showed a mean of 5.9°C, which was 0.3°C above normal. The coldest daily minimum recorded so far in early 2026 reached 32.9°F (0.5°C), demonstrating the typical range Londoners can expect.
While freezing conditions do occur in London during January, they remain sporadic rather than persistent. Temperatures in the 28-33°F range (-2 to 0°C) can be expected during particularly cold days, but extended cold snaps with sustained freezing temperatures are uncommon. The growing season probability in mid-January is only around 13%, confirming winter’s firm hold on the city. Frost may develop occasionally when temperatures approach or reach 32°F (0°C). The west wind prevails throughout January, with speeds averaging around 13.1 mph and contributing to the windchill effect.
January’s short daylight hours contribute to the chilly feeling, with the shortest day occurring early in the month. Measurable precipitation is common throughout January, though temperature patterns remain relatively consistent without extreme daily fluctuations. London’s January temperatures closely mirror the broader UK January averages, confirming the capital’s typical winter weather experience.
