Warmest places to go from Barcelona in September
The warmest place you can reach from Barcelona in September within 15 hours is Edfu at 34.0 °C, costing 846 kg CO₂e return. The lowest-carbon option is Tortosa at 4.5 kg — 188× less carbon for 11.7 °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
| Destination | How | CO₂e return | Temp | Sun/day | Rain/day | Journey |
|---|---|---|---|---|---|---|
| Tortosa, Spain | Rail | 4.5 kg | 22.3 °C | 10.3 h | 2.5 mm | 4h 6m |
| Alzira, Spain | Rail | 9.8 kg | 23.3 °C | 10.1 h | 2.4 mm | 6h 30m |
| San Javier, Spain | Rail | 14.0 kg | 24.2 °C | 10.9 h | 1.3 mm | 8h 30m |
| Jendouba, Tunisia | Air | 199 kg | 26.0 °C | 10.4 h | 1.0 mm | 4h 36m |
| Kairouan, Tunisia | Air | 236 kg | 27.0 °C | 10.7 h | 0.7 mm | 4h 42m |
| Tozeur, Tunisia | Air | 247 kg | 29.4 °C | 10.3 h | 0.3 mm | 4h 48m |
| Al Fayyum, Egypt | Air | 732 kg | 30.3 °C | 11.7 h | 0.0 mm | 7h 24m |
| Assiut, Egypt | Air | 774 kg | 31.6 °C | 11.7 h | 0.0 mm | 7h 36m |
| Sohag, Egypt | Air | 795 kg | 32.3 °C | 11.7 h | 0.0 mm | 7h 42m |
| Sharm el-Sheikh, Egypt | Air | 824 kg | 33.7 °C | 11.5 h | 0.0 mm | 7h 54m |
| Edfu, Egypt | Air | 846 kg | 34.0 °C | 11.5 h | 0.0 mm | 8h |
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 Tozeur (247 kg, 29.4 °C) to Al Fayyum (732 kg, 30.3 °C) buys 0.9 °C more warmth for an extra 485 kg — 538 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 Barcelona 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 Edfu
Places to stay in Edfu, 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 Barcelona
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 Barcelona in September?
Edfu, Egypt, at 34.0 °C. Reaching it emits 846 kg CO₂e return, travelling 8h each way by air.
Can I get somewhere warm from Barcelona in September without flying?
Yes. San Javier reaches 24.2 °C and is reachable by rail or ferry in 8h 30m, emitting 14.0 kg CO₂e return — though Edfu is warmer still, if you fly.
How much carbon does a return trip from Barcelona to Edfu produce?
846 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.