Oslo · September
Run in the morning.
Cool month: average high 61°F, low 50°F. Humidity averages 79% — the limiting factor on most runs. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
Avg high / low
61° / 50°F
Humidity
79%
Rain days
14/mo
Wind
10 mph
What September feels like in Oslo
Sunrise
06:46
Mid-month average
Sunset
19:37
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 Oslo in September
The kit for September in Oslo: a long-sleeve or light jacket for the first mile, a water-resistant cap or jacket on standby.
September vs the surrounding months
vs August
-7° avg high
-3 rain days
Oslo in August →
September
61°F avg high
14 rain days
Best: morning
vs October
+12° avg high
-2 rain days
Oslo in October →
Frequently Asked Questions
What is the best time of day to run in Oslo in September?+
Morning. Cool, runnable conditions throughout — morning still has the steadiest air and lightest wind.
What's the average temperature in Oslo in September?+
Average high 61°F, average low 50°F.
How does September compare to surrounding months in Oslo?+
Compared to August (avg high 68°F), September is cooler. Compared to October (avg high 49°F), September is warmer.
Does it rain often in Oslo in September?+
Expect about 14 measurable rain days in September, on average.