Bristol · May
Run in the morning.
Cool month: average high 61°F, low 47°F. Humidity averages 77% — the limiting factor on most runs. Expect 17 rain days — plan around the radar. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
Avg high / low
61° / 47°F
Humidity
77%
Rain days
17/mo
Wind
13 mph
What May feels like in Bristol
Sunrise
05:18
Mid-month average
Sunset
20:55
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 Bristol in May
The kit for May in Bristol: 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
+3 rain days
Bristol in April →
May
61°F avg high
17 rain days
Best: morning
vs June
-6° avg high
0 rain days
Bristol in June →
Frequently Asked Questions
What is the best time of day to run in Bristol in May?+
Morning. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
What's the average temperature in Bristol in May?+
Average high 61°F, average low 47°F.
How does May compare to surrounding months in Bristol?+
Compared to April (avg high 55°F), May is warmer. Compared to June (avg high 67°F), May is cooler.
Does it rain often in Bristol in May?+
Expect about 17 measurable rain days in May, on average.