Sunniest places to go from Oslo in September
The sunniest place you can reach from Oslo in September within 15 hours is Izmir at 11.6 h, costing 668 kg CO₂e return. The lowest-carbon option is Karlstad at 4.9 kg — 136× less carbon for 3.4 h less.
Every destination here is on the efficiency frontier: nowhere else in Europe is both sunnier in September and lower in carbon. Anything a better option beats outright has been left out.
By rail or ferry By air
What the 15-hour limit costs: at this budget Kaunas can only be reached by air — 242 kg CO₂e, in 4h 48m. Allow up to 24 hours and the train does the same journey for 28.4 kg in 15h 12m — 9× less carbon for 10h 24m more travelling.
| Destination | How | CO₂e return | Temp | Sun/day | Rain/day | Journey |
|---|---|---|---|---|---|---|
| Karlstad, Sweden | Rail | 4.9 kg | 14.5 °C | 8.2 h | 2.8 mm | 4h 18m |
| Gothenburg, Sweden | Rail | 7.5 kg | 15.0 °C | 9.0 h | 3.2 mm | 5h 30m |
| Varberg, Sweden | Rail | 9.6 kg | 15.8 °C | 9.5 h | 3.3 mm | 6h 24m |
| Copenhagen, Denmark | Rail | 14.3 kg | 16.5 °C | 10.0 h | 1.5 mm | 8h 36m |
| Kaunas, Lithuania | Air | 242 kg | 17.5 °C | 10.6 h | 1.1 mm | 4h 48m |
| Mangalia, Romania | Air | 542 kg | 21.1 °C | 11.1 h | 1.7 mm | 6h 24m |
| Izmir, Turkey | Air | 668 kg | 24.9 °C | 11.6 h | 1.0 mm | 7h |
Warm is not the same as pleasant, which is why sunshine and rainfall are shown alongside temperature. All three are ERA5 monthly means for 2023–2024.
Where the curve breaks
The frontier is gentle until it isn't. Going from Kaunas (242 kg, 10.6 h) to Mangalia (542 kg, 11.1 h) buys 0.5 hours more sunshine for an extra 300 kg — 599 kg of CO₂e per hour. That single step is the most expensive sunshine on the whole curve.
The pick of them
If you'd rather have heat than sunshine
September answers differently depending on what you're after. The warmest destinations from Oslo in September are a different list — hours of sunshine and degrees of warmth come apart, especially early and late in the year.
Where to stay in Izmir
Places to stay in Izmir, Turkey, on a live map. Prices and availability come from Stay22 and its booking partners.
Affiliate disclosure. A booking made through this map may earn 0xCarbon a commission, at no extra cost to you. It changes nothing above it: the emissions figures come from UK Government conversion factors and are computed before anyone is paid anything.See the method.
Other months from Oslo
September from elsewhere
- Amsterdam
- Barcelona
- Berlin
- Birmingham
- Bristol
- Brussels
- Cardiff
- Copenhagen
- Dublin
- Edinburgh
- Frankfurt
- Glasgow
- Leeds
- Lisbon
- Liverpool
- London
- Madrid
- Manchester
- Milan
- Munich
- Newcastle
- Nottingham
- Oslo
- Paris
- Prague
- Rome
- Sheffield
- Southampton
- Stockholm
- Vienna
- Warsaw
- Zurich
Questions
Where is the sunniest place to go from Oslo in September?
Izmir, Turkey, at 11.6 h. Reaching it emits 668 kg CO₂e return, travelling 7h each way by air.
Can I get somewhere sunny from Oslo in September without flying?
Yes. Copenhagen reaches 10.0 h and is reachable by rail or ferry in 8h 36m, emitting 14.3 kg CO₂e return — though Izmir is sunnier still, if you fly.
How much carbon does a return trip from Oslo to Izmir produce?
668 kg CO₂e for one person, return, by air. That uses the UK Government's 2026 conversion factors, including radiative forcing for flights.
Carbon uses UK Government (DESNZ/DEFRA) 2026 conversion factors applied to great-circle distance, with radiative forcing included for flights. Rail journey times are modelled estimates, not timetabled services. Full method · download the data.