Warmest places to go from Copenhagen in September
The warmest place you can reach from Copenhagen in September within 15 hours is Kom Ombo at 34.4 °C, costing 900 kg CO₂e return. The lowest-carbon option is Stralsund at 4.6 kg — 196× less carbon for 17.2 °C less.
Every destination here is on the efficiency frontier: nowhere else in Europe is both warmer 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 Foggia can only be reached by air — 401 kg CO₂e, in 5h 36m. Allow up to 24 hours and the train does the same journey for 47.1 kg in 23h 48m — 9× less carbon for 18h 12m more travelling.
| Destination | How | CO₂e return | Temp | Sun/day | Rain/day | Journey |
|---|---|---|---|---|---|---|
| Stralsund, Germany | Rail | 4.6 kg | 17.2 °C | 9.8 h | 2.0 mm | 4h 6m |
| Świnoujście, Poland | Rail | 6.6 kg | 18.1 °C | 9.8 h | 1.0 mm | 5h 6m |
| Trnava, Slovakia | Rail | 26.0 kg | 19.0 °C | 9.4 h | 3.6 mm | 14h 6m |
| Trento, Italy | Air | 270 kg | 19.8 °C | 10.0 h | 3.5 mm | 4h 54m |
| Trieste, Italy | Air | 281 kg | 20.8 °C | 9.8 h | 6.4 mm | 5h |
| Pula, Croatia | Air | 303 kg | 21.8 °C | 9.8 h | 4.8 mm | 5h 6m |
| Foggia, Italy | Air | 401 kg | 23.2 °C | 10.3 h | 2.0 mm | 5h 36m |
| Taranto, Italy | Air | 434 kg | 24.3 °C | 11.0 h | 0.9 mm | 5h 48m |
| Catania, Italy | Air | 511 kg | 24.7 °C | 11.0 h | 1.2 mm | 6h 12m |
| Tunis, Tunisia | Air | 529 kg | 25.7 °C | 10.9 h | 0.9 mm | 6h 18m |
| Kairouan, Tunisia | Air | 561 kg | 27.0 °C | 10.7 h | 0.7 mm | 6h 30m |
| Metlaoui, Tunisia | Air | 603 kg | 27.7 °C | 10.5 h | 0.3 mm | 6h 42m |
| Tozeur, Tunisia | Air | 615 kg | 29.4 °C | 10.3 h | 0.3 mm | 6h 48m |
| Al Fayyum, Egypt | Air | 822 kg | 30.3 °C | 11.7 h | 0.0 mm | 7h 54m |
| Eilat, Israel | Air | 855 kg | 31.3 °C | 11.4 h | 0.0 mm | 8h |
| Luxor, Egypt | Air | 868 kg | 33.6 °C | 11.6 h | 0.0 mm | 8h 24m |
| Kom Ombo, Egypt | Air | 900 kg | 34.4 °C | 11.5 h | 0.0 mm | 8h 36m |
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 Trnava (26.0 kg, 19.0 °C) to Trento (270 kg, 19.8 °C) buys 0.8 °C more warmth for an extra 244 kg — 305 kg of CO₂e per degree. That single step is the most expensive warmth on the whole curve.
The pick of them
If you'd rather have sunshine than heat
September answers differently depending on what you're after. The sunniest destinations from Copenhagen in September are a different list — the brightest places are not always the hottest, and in winter the difference is large.
Where to stay in Kom Ombo
Places to stay in Kom Ombo, Egypt, 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 Copenhagen
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 warmest place to go from Copenhagen in September?
Kom Ombo, Egypt, at 34.4 °C. Reaching it emits 900 kg CO₂e return, travelling 8h 36m each way by air.
Can I get somewhere warm from Copenhagen in September without flying?
Yes. Trnava reaches 19.0 °C and is reachable by rail or ferry in 14h 6m, emitting 26.0 kg CO₂e return — though Kom Ombo is warmer still, if you fly.
How much carbon does a return trip from Copenhagen to Kom Ombo produce?
900 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.