Barcelona · September
Run in the morning.
Comfortable average high of 77°F, dipping to 65°F at night. Humidity averages 79% — the limiting factor on most runs. Expect 15 rain days — plan around the radar. Humidity rises with the sun — morning runs catch the driest, coolest window.
Avg high / low
77° / 65°F
Humidity
79%
Rain days
15/mo
Wind
11 mph
What September feels like in Barcelona
Sunrise
07:32
Mid-month average
Sunset
19:60
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 Barcelona in September
The kit for September in Barcelona: shorts and a short-sleeve are the standard kit, a water-resistant cap or jacket on standby.
September vs the surrounding months
vs August
-6° avg high
+4 rain days
Barcelona in August →
September
77°F avg high
15 rain days
Best: morning
vs October
+6° avg high
+3 rain days
Barcelona in October →
Frequently Asked Questions
What is the best time of day to run in Barcelona in September?+
Morning. Humidity rises with the sun — morning runs catch the driest, coolest window.
What's the average temperature in Barcelona in September?+
Average high 77°F, average low 65°F.
How does September compare to surrounding months in Barcelona?+
Compared to August (avg high 83°F), September is cooler. Compared to October (avg high 71°F), September is warmer.
Does it rain often in Barcelona in September?+
Expect about 15 measurable rain days in September, on average.