January Weather in London, United States

Last updated: June 24, 2025

In London, United States during January, the average temperature hovers around 3°C (38°F). Temperatures can vary significantly, with a minimum of -19°C (-2°F) and a potential maximum reaching 21°C (70°F). Expect considerable precipitation of 98 mm (3.9 in) over 11 days, contributing to an average humidity level of 88%.

January Temperature in London

In January in London, the average temperature is 3°C (38°F), with maximums reaching up to 21°C (70°F) and minimums dropping as low as -19°C (-2°F). Travelers should be prepared for a wide range of temperatures during this month.

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 3°C (38°F), with highs reaching up to 21°C (70°F) and lows dropping to around -19°C (-2°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 total precipitation amount is 98 mm (3.9 in) over the course of 11 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 98 mm (3.9 inches) of precipitation spread over approximately 11 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 88%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and requiring extra layers to stay comfortable while traveling.

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 88%, 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 is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in London, you can check the information here.

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 3, 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	3°C (38°F)	98 mm (3.9 inches)	88%	moderate
February Weather	6°C (43°F)	179 mm (7.0 inches)	88%	high
March Weather	10°C (49°F)	134 mm (5.3 inches)	87%	high
April Weather	14°C (57°F)	134 mm (5.3 inches)	84%	very high
May Weather	20°C (67°F)	126 mm (5.0 inches)	84%	extreme
June Weather	23°C (73°F)	141 mm (5.5 inches)	83%	extreme
July Weather	25°C (78°F)	109 mm (4.3 inches)	79%	extreme
August Weather	24°C (76°F)	123 mm (4.8 inches)	66%	very high
September Weather	22°C (72°F)	107 mm (4.2 inches)	67%	very high
October Weather	16°C (61°F)	120 mm (4.7 inches)	76%	high
November Weather	8°C (46°F)	76 mm (3.0 inches)	89%	moderate
December Weather	6°C (43°F)	135 mm (5.3 inches)	88%	moderate