January Weather in London, United States

Last updated: June 24, 2025

In January, the average temperature in London, United States hovers around -1°C (30°F). Expect a wide temperature range, with minimums plunging to -24°C (-11°F) and maximums reaching a pleasant 21°C (70°F). This month also brings about 75 mm (3.0 in) of precipitation over approximately 9 days, contributing to the region's average humidity of 88%.

January Temperature in London

In January in London, the average temperature is -1°C (30°F), with maximums reaching 21°C (70°F) and minimums plummeting to -24°C (-11°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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 -1°C (30°F), with highs reaching up to 21°C (70°F) and lows dropping to around -24°C (-11°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 75 mm (3.0 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 75 mm (3.0 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 88%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through your layers, making travel uncomfortable as every gust of wind becomes a sharp reminder of the cold and damp air surrounding you.

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	-1°C (30°F)	75 mm (3.0 inches)	88%	moderate
February Weather	1°C (34°F)	104 mm (4.1 inches)	88%	moderate
March Weather	6°C (42°F)	108 mm (4.2 inches)	87%	high
April Weather	11°C (52°F)	111 mm (4.4 inches)	85%	very high
May Weather	17°C (64°F)	131 mm (5.1 inches)	81%	very high
June Weather	22°C (72°F)	134 mm (5.3 inches)	82%	very high
July Weather	24°C (75°F)	120 mm (4.7 inches)	81%	very high
August Weather	23°C (73°F)	99 mm (3.9 inches)	73%	very high
September Weather	20°C (69°F)	94 mm (3.7 inches)	73%	very high
October Weather	14°C (58°F)	95 mm (3.7 inches)	78%	high
November Weather	5°C (42°F)	95 mm (3.7 inches)	89%	moderate
December Weather	2°C (36°F)	95 mm (3.8 inches)	87%	moderate