London · May
Run in the morning.
Cool month: average high 63°F, low 47°F. Expect 15 rain days — plan around the radar. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
Avg high / low
63° / 47°F
Humidity
74%
Rain days
15/mo
Wind
13 mph
What May feels like in London
Sunrise
05:08
Mid-month average
Sunset
20:46
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 May
The kit for May in London: a long-sleeve or light jacket for the first mile, a water-resistant cap or jacket on standby.
May vs the surrounding months
vs April
+6° avg high
+2 rain days
London in April →
May
63°F avg high
15 rain days
Best: morning
vs June
-7° avg high
+1 rain days
London in June →
Frequently Asked Questions
What is the best time of day to run in London in May?+
Morning. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
What's the average temperature in London in May?+
Average high 63°F, average low 47°F.
How does May compare to surrounding months in London?+
Compared to April (avg high 57°F), May is warmer. Compared to June (avg high 70°F), May is cooler.
Does it rain often in London in May?+
Expect about 15 measurable rain days in May, on average.