Sunniest places to go from Bristol in September
The sunniest place you can reach from Bristol in September within 15 hours is Izmir at 11.6 h, costing 685 kg CO₂e return. The lowest-carbon option is Hemel Hempstead at 12.2 kg — 56× less carbon for 3.7 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 Tomelloso can only be reached by air — 344 kg CO₂e, in 5h 18m. Allow up to 24 hours and the train does the same journey for 54.8 kg in 23h 24m — 6× less carbon for 18h 6m more travelling.
| Destination | How | CO₂e return | Temp | Sun/day | Rain/day | Journey |
|---|---|---|---|---|---|---|
| Hemel Hempstead, United Kingdom | Rail | 12.2 kg | 15.6 °C | 7.9 h | 4.0 mm | 4h 6m |
| Bognor Regis, United Kingdom | Rail | 12.3 kg | 16.5 °C | 8.9 h | 3.8 mm | 4h 6m |
| Nijmegen, The Netherlands | Rail | 26.0 kg | 17.2 °C | 9.6 h | 2.3 mm | 10h |
| Düsseldorf, Germany | Rail | 27.9 kg | 17.5 °C | 9.9 h | 2.7 mm | 10h 54m |
| Aix-en-Provence, France | Air | 269 kg | 19.3 °C | 10.8 h | 2.1 mm | 4h 54m |
| Tomelloso, Spain | Air | 344 kg | 21.3 °C | 11.1 h | 1.4 mm | 5h 18m |
| Izmir, Turkey | Air | 685 kg | 24.9 °C | 11.6 h | 1.0 mm | 7h 6m |
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 Tomelloso (344 kg, 11.1 h) to Izmir (685 kg, 11.6 h) buys 0.5 hours more sunshine for an extra 341 kg — 683 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 Bristol 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 Bristol
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 Bristol in September?
Izmir, Turkey, at 11.6 h. Reaching it emits 685 kg CO₂e return, travelling 7h 6m each way by air.
Can I get somewhere sunny from Bristol in September without flying?
Yes. Düsseldorf reaches 9.9 h and is reachable by rail or ferry in 10h 54m, emitting 27.9 kg CO₂e return — though Izmir is sunnier still, if you fly.
How much carbon does a return trip from Bristol to Izmir produce?
685 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.