London Weather in December
United Kingdom · Oceanic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
December in London sees average temperatures ranging from a low of 4.1°C (39.4°F) to a high of 8.8°C (47.8°F), with a mean of 6.5°C (43.7°F). Compared to the annual average of 11.5°C (52.7°F), this month is 5.0°C cooler than the yearly norm. Precipitation averages 66.8mm, making it approximately 2.0mm wetter than the monthly average of 65.0mm. The city receives an average of 3.1 hours of sunshine per day during December, with relative humidity averaging 88.0%. Wind speeds reach an average maximum of 22.2 km/h. Snowfall averages 0.5cm during December, which can affect travel plans and outdoor activities. For travelers, this month offers a temperature experience in London, with wetter-than-average conditions compared to the rest of the year.
Having spent three winters in London, I can tell you the drizzle never really stops — it just changes intensity. The data says October is wettest, but honestly, it's the persistence rather than volume that gets you. May is my favorite: parks burst into bloom and you'll catch surprising stretches of sunshine between showers. The numbers say June-August is 'best,' but pack a light jacket regardless.
December vs Adjacent Months
| Metric | November | December | January |
|---|---|---|---|
| Mean Temp | 8.5°C (47.3°F) | 6.5°C (43.7°F) | 4.9°C (40.8°F) |
| Rainfall | 70.5mm | 66.8mm | 64.2mm |
| Sunshine | 4.6 hrs | 3.1 hrs | 4.3 hrs |
| Humidity | 86.4% | 88.0% | 86.9% |
| Wind | 21.2 km/h | 22.2 km/h | 23.0 km/h |
| Rainy Days | 14.4 | 18.0 | 14.8 |
| Snowfall | 0.6 cm | 0.5 cm | 1.1 cm |
Seasonal Context
December falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting London in December, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in London in December?
The average temperature in London during December ranges from 4.1°C (39.4°F) to 8.8°C (47.8°F), with a mean of 6.5°C (43.7°F).
How much does it rain in London in December?
London receives an average of 66.8mm of precipitation in December, spread across approximately 18.0 rainy days.
What should I pack for London in December?
Based on December weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is December a good time to visit London?
December is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for London
Cities with Similar December Climate (Oceanic)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 51.51°, -0.13°. Timezone: Europe/London. Last updated: 2026-07-30.