Weather in Oslo in September
How warm is it in Oslo in September?
In September the typical daytime high in Oslo is 16.4 °C on average, from 19.1 °C at the start to 13.4 °C at the end of the month.
That is 4.6 °C cooler than in August and 6.4 °C warmer than in October.
The last 10 years were 1.7 °C warmer than more than 40 years ago.
Click a day for more: afternoon and night, the usual range, records and how fast it is warming.
Measured at the weather station Oslo Blindern, 4 km away.