Early autumn · Weather & things to do
Oslo in September
Oslo cools off: highs slip to 61°F (16°C), from 69°F in August, with lows of 47°F (8°C) and about 3.8 in (96 mm) of rain.
It scores 73/100 for comfort, 5th of 12, which makes it a solid shoulder-season month.
- Avg high
- 61°F (16°C)
- Avg low
- 47°F (8°C)
- Rain
- 3.8 in (96 mm)
- Humidity
- 87%
- Cloud cover
- 73%
- Daylight
- ~12 h 31 min
- Comfort score
- 73/100 · Good
What September feels like
Expect mild afternoons around 61°F (16°C), good for long walks.
Nights cool to an average low of 47°F (8°C).
Showers are part of the month, adding up to about 3.8 in (96 mm).
Plan around September
September is shoulder season: good weather, a step below the best months (May – August).
- Comfort slips from 77/100 in August to 73/100.
- Our Scandinavian Capitals route recommends Jun – Aug, so September falls outside its suggested window.
What to pack for September
- A warm layer for eveningslows near 47°F
- Packable rain jacket or umbrellaabout 3.8 in of rain
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Oslo in September
With conditions on your side, the picks below favor time outside.
Oslo Opera House
Marble roof you can walk straight up for views over the Oslofjord.
Why now September scores 73/100 for comfort, good conditions for being outside.
Tim Wendelboe
Tiny roastery-café run by a world barista champion.
Fram Museum
The polar ship Fram, which you can board, plus polar exploration exhibits.
Holmenkollen Ski Museum & Tower
Ski jump with a top-of-tower view and a ski history museum.
Vigeland Park
Over 200 Gustav Vigeland sculptures set in Frogner Park.
Why now Highs near 61°F and 3.8 in of monthly rain make this an easy outdoor pick.
Nearby in September
- Flåm in September~140 mi · highs 59°F, 6.8 in rain · similar daytime temperatures, wetter
- Bergen in September~190 mi · highs 59°F, 10.6 in rain · 1°C (2°F) cooler by day, wetter
- Geiranger in September~192 mi · highs 56°F, 9.1 in rain · 2°C (4°F) cooler by day, wetter
- Stockholm in September~259 mi · highs 62°F, 2.2 in rain · similar daytime temperatures, drier
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~259 m to Oslo's ~22 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Oslo in September: quick answers
Is September a good time to visit Oslo?
It's a good shoulder-season choice, scoring 73/100 against a best of 81 in May – August. Expect highs of 61°F (16°C) and 3.8 in (96 mm) of rain. Our Scandinavian Capitals route recommends Jun – Aug, so September is outside its suggested window.
How cold is Oslo in September?
Average highs are 61°F (16°C) and average lows 47°F (8°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Oslo in September?
Some: about 3.8 in (96 mm) of rain falls across September on average, the 5th-wettest month of the year. The annual total is about 41.3 in (1049 mm).
What should I pack for Oslo in September?
Bring a warm layer for evenings (lows near 47°F), packable rain jacket or umbrella (about 3.8 in of rain) and comfortable walking shoes (most places below are best reached on foot or with short walks).
Planning Oslo in September?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.