Warmest places to go from Brussels in September
The warmest place you can reach from Brussels in September within 15 hours is Edfu at 34.0 °C, costing 882 kg CO₂e return. The lowest-carbon option is Krefeld at 4.8 kg — 184× less carbon for 16.7 °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 |
|---|---|---|---|---|---|---|
| Krefeld, Germany | Rail | 4.8 kg | 17.3 °C | 9.8 h | 2.5 mm | 4h 12m |
| Karlsruhe, Germany | Rail | 10.5 kg | 18.1 °C | 9.7 h | 2.3 mm | 6h 54m |
| Aix-les-Bains, France | Rail | 17.3 kg | 18.9 °C | 9.3 h | 4.8 mm | 10h |
| Milan, Italy | Rail | 20.6 kg | 19.9 °C | 9.6 h | 5.3 mm | 11h 36m |
| Imperia, Italy | Rail | 24.3 kg | 21.9 °C | 10.4 h | 2.9 mm | 13h 18m |
| Alghero, Italy | Air | 298 kg | 22.9 °C | 10.7 h | 1.3 mm | 5h 6m |
| Ibiza Town, Spain | Air | 339 kg | 24.2 °C | 10.8 h | 1.6 mm | 5h 18m |
| Tunis, Tunisia | Air | 409 kg | 25.7 °C | 10.9 h | 0.9 mm | 5h 42m |
| Kairouan, Tunisia | Air | 440 kg | 27.0 °C | 10.7 h | 0.7 mm | 5h 48m |
| Metlaoui, Tunisia | Air | 470 kg | 27.7 °C | 10.5 h | 0.3 mm | 6h |
| Tozeur, Tunisia | Air | 480 kg | 29.4 °C | 10.3 h | 0.3 mm | 6h |
| Al Fayyum, Egypt | Air | 819 kg | 30.3 °C | 11.7 h | 0.0 mm | 7h 48m |
| Mallawi, Egypt | Air | 855 kg | 31.3 °C | 11.8 h | 0.0 mm | 8h |
| Edfu, Egypt | Air | 882 kg | 34.0 °C | 11.5 h | 0.0 mm | 8h 30m |
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 (480 kg, 29.4 °C) to Al Fayyum (819 kg, 30.3 °C) buys 0.9 °C more warmth for an extra 339 kg — 376 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 Brussels 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 Brussels
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 Brussels in September?
Edfu, Egypt, at 34.0 °C. Reaching it emits 882 kg CO₂e return, travelling 8h 30m each way by air.
Can I get somewhere warm from Brussels in September without flying?
Yes. Imperia reaches 21.9 °C and is reachable by rail or ferry in 13h 18m, emitting 24.3 kg CO₂e return — though Edfu is warmer still, if you fly.
How much carbon does a return trip from Brussels to Edfu produce?
882 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.