January Weather in London, United States

Last updated: June 24, 2025

In January, the average temperature in London, United States hovers around 5°C (41°F), with a minimum dropping to -15°C (5°F) and a maximum soaring to 22°C (72°F). Be prepared for 88 mm (3.4 in) of precipitation spread across 9 days, contributing to an average humidity of 82%. Stay warm and dry while enjoying the unique climate!

January Temperature in London

In January in London, the average temperature is 5°C (41°F). The maximum can reach 22°C (72°F), while the minimum can drop as low as -15°C (5°F). This wide temperature range suggests that travelers should dress in layers to accommodate both warm and cold conditions.

January Weather in London: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in London, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In London, January typically has an average temperature of 5°C (41°F), with highs reaching up to 22°C (72°F) and lows dropping to around -15°C (5°F).

Data source: Temperature data for London generated using information from the Copernicus Climate Change Service.

January Precipitation in London

In London in January, the precipitation amount is 88 mm (3.4 in) distributed over 9 days.

January Precipitation Trends in London

The chart displays monthly precipitation patterns in London, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In London, January typically receives around 88 mm (3.4 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in London

In London in January, humidity is 82%. With an average temperature of 5°C (41°F), this humidity feels like a chilly, damp blanket wrapping around you, making outdoor activities less enjoyable and making it essential to dress in layers to stay warm while navigating the wet conditions.

January Average Humidity in London

This chart illustrates the average monthly humidity levels in London, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in London is approximately 82%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in London

In London in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in London for better planning.

Maximum UV Index Levels in London for January

The chart shows the monthly maximum UV Index (UVI) for London in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in London typically reaches 4, which falls under the moderate exposure category.

Data source: London January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in London Compares to Other Months

Weather in London varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in London, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in London, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	88 mm (3.4 inches)	82%	moderate
February Weather	7°C (44°F)	135 mm (5.3 inches)	79%	high
March Weather	12°C (54°F)	140 mm (5.5 inches)	77%	very high
April Weather	15°C (60°F)	150 mm (5.9 inches)	78%	very high
May Weather	21°C (70°F)	198 mm (7.8 inches)	82%	very high
June Weather	26°C (78°F)	122 mm (4.8 inches)	81%	extreme
July Weather	27°C (82°F)	86 mm (3.4 inches)	75%	extreme
August Weather	26°C (80°F)	127 mm (5.0 inches)	61%	very high
September Weather	24°C (76°F)	65 mm (2.6 inches)	59%	very high
October Weather	17°C (64°F)	103 mm (4.1 inches)	69%	high
November Weather	10°C (51°F)	88 mm (3.4 inches)	82%	moderate
December Weather	8°C (46°F)	100 mm (3.9 inches)	87%	moderate