Copenhagen · September
Run in the morning.
Cool month: average high 64°F, low 55°F. Humidity averages 79% — the limiting factor on most runs. Expect 15 rain days — plan around the radar. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
Avg high / low
64° / 55°F
Humidity
79%
Rain days
15/mo
Wind
15 mph
What September feels like in Copenhagen
Sunrise
06:42
Mid-month average
Sunset
19:26
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 Copenhagen in September
The kit for September in Copenhagen: shorts and a short-sleeve are the standard kit, a wind-blocking layer for exposed routes, a water-resistant cap or jacket on standby.
September vs the surrounding months
vs August
-5° avg high
-2 rain days
Copenhagen in August →
September
64°F avg high
15 rain days
Best: morning
vs October
+9° avg high
-3 rain days
Copenhagen in October →
Frequently Asked Questions
What is the best time of day to run in Copenhagen in September?+
Morning. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
What's the average temperature in Copenhagen in September?+
Average high 64°F, average low 55°F.
How does September compare to surrounding months in Copenhagen?+
Compared to August (avg high 69°F), September is cooler. Compared to October (avg high 55°F), September is warmer.
Does it rain often in Copenhagen in September?+
Expect about 15 measurable rain days in September, on average.