Weather in Oslo in September
As an Amazon Associate we earn from qualifying purchases. We also earn commission from other retail partners. Links below are affiliate links.
Book now, pay at pickup — compare Hertz, Avis, Budget, Sixt and 800+ rental companies for September in Oslo.
Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youSeptember in Oslo is cool, with average highs of 16.4°C and lows of 9.6°C. It is fairly wet (9 rainy days on average), with roughly 7.7 hours of sunshine a day. This is peak season for good reason — conditions are close to ideal. For the complete picture, see the best time to visit Oslo — every month compared. Once you know when to go, find your Oslo packing list at 247PackingList.
Get ready for Oslo in September
Search flights to Oslo
Compare 100+ airlines for September — one search, best price.
Search Flights →Thermal travel layers
Pack proper layers — winters are genuinely cold and evenings drop fast year-round.
Check Price →What to pack for Oslo in September
- Warm layers
- Light jacket or fleece
- Comfortable walking shoes
- Light waterproof layer
Compare all months in Oslo
| Month | High | Rain | Rating |
|---|---|---|---|
| January | 0.9°C | 66.7mm | 8/10 |
| February | 2.3°C | 55.3mm | 8/10 |
| March | 5.2°C | 47.4mm | 10/10 |
| April | 10.1°C | 47.4mm | 10/10 |
| May | 15.0°C | 64.0mm | 10/10 |
| June | 22.1°C | 79.8mm | 10/10 |
| July | 20.3°C | 131.1mm | 9/10 |
| August | 20.3°C | 83.3mm | 10/10 |
| September | 16.4°C | 80.0mm | 10/10 |
| October | 9.9°C | 104.5mm | 9/10 |
| November | 4.5°C | 77.2mm | 8/10 |
| December | -1.0°C | 83.9mm | 6/10 |
Full month-by-month guide: best time to visit Oslo →
For facts about Norway — currency, language and dialling code — see our Norway country guide at 247CountryInfo. Travellers also find it useful to keep a Oslo travel guide to hand. Check clothing sizes in Norway before you shop.
Frequently Asked Questions
Is September a good time to visit Oslo?
September rates 10/10 for visiting Oslo — excellent time to visit. Expect average highs of 16.4°C, 80.0mm of rain across the month and about 7.7 hours of daily sunshine.
What is the temperature in Oslo in September?
In September, Oslo has average highs of 16.4°C (61.5°F) and average lows of 9.6°C (49.3°F).
Does it rain in Oslo in September?
Some rain is likely. Oslo averages 80.0mm across about 9 rainy days in September, so a light waterproof layer is worth packing.
What should I wear in Oslo in September?
For Oslo in September (16.4°C highs / 9.6°C lows), pack warm layers plus light jacket or fleece, comfortable walking shoes, light waterproof layer.
More essentials for Oslo in September
Packing cubes
Keep the bag organised whatever the weather — compression cubes for every size.
Check Price →Travel first aid kit
Compact TSA-friendly kit for peace of mind wherever you travel.
Check Price →Last updated:
Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.