London · January
Run in the midday.
Cold: average high 46°F, low 35°F. Layering becomes the workout. Humidity averages 87% — the limiting factor on most runs. Expect 17 rain days — plan around the radar. Cold mornings warm into runnable midday hours — the windows around noon catch the warmest temperatures.
Avg high / low
46° / 35°F
Humidity
87%
Rain days
17/mo
Wind
14 mph
What January feels like in London
Sunrise
08:56
Mid-month average
Sunset
17:22
Mid-month average
Time-of-day breakdown
Morning
Coolest, driest air of the day. The window before sunrise is the most reliable comfortable hour.
Midday
Mild but UV and traffic peak. Workable if you don't mind shifting your pace.
Evening
Warm and runnable. Crowded routes but the air's typically calm.
What to wear running in London in January
The kit for January in London: a long-sleeve or light jacket for the first mile, a wind-blocking layer for exposed routes, a water-resistant cap or jacket on standby.
January vs the surrounding months
vs December
-2° avg high
0 rain days
London in December →
January
46°F avg high
17 rain days
Best: midday
vs February
-2° avg high
+2 rain days
London in February →
Frequently Asked Questions
What is the best time of day to run in London in January?+
Midday. Cold mornings warm into runnable midday hours — the windows around noon catch the warmest temperatures.
What's the average temperature in London in January?+
Average high 46°F, average low 35°F.
How does January compare to surrounding months in London?+
Compared to December (avg high 48°F), January is cooler. Compared to February (avg high 48°F), January is cooler.
Does it rain often in London in January?+
Expect about 17 measurable rain days in January, on average.