Brussels · September · sunshine

Sunniest places to go from Brussels in September

The sunniest place you can reach from Brussels in September within 15 hours is Fethiye at 11.8 h, costing 634 kg CO₂e return. The lowest-carbon option is Krefeld at 4.8 kg — 132× less carbon for 2.0 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.

Where they are. Solid lines are rail or ferry, dashed are flights, from Brussels. Pick one to compare.

By rail or ferry By air

Carbon against sunshine, September, departing Brussels. Journeys of up to 15 hours each way.

September from Brussels — 5 destinations on the frontier, 3 without flying.
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
Avignon, France	Rail	22.7 kg	20.1 °C	10.3 h	3.1 mm	12h 30m
Aix-en-Provence, France	Rail	24.2 kg	19.3 °C	10.8 h	2.1 mm	13h 12m
Granada, Spain	Air	414 kg	21.6 °C	11.5 h	0.9 mm	5h 42m
Fethiye, Turkey	Air	634 kg	26.0 °C	11.8 h	1.6 mm	6h 54m

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 Granada (414 kg, 11.5 h) to Fethiye (634 kg, 11.8 h) buys 0.3 hours more sunshine for an extra 220 kg — 734 kg of CO₂e per hour. That single step is the most expensive sunshine on the whole curve.

The pick of them

KrefeldGermany4.8 kg CO₂e return17.3 °C · 9.8 h sun · 4h 12m by railwarm overall Aix-en-ProvenceFrance24.2 kg CO₂e return19.3 °C · 10.8 h sun · 13h 12m by railwarm overall FethiyeTurkey634 kg CO₂e return26.0 °C · 11.8 h sun · 6h 54m by airwarm overall

If you'd rather have heat than sunshine

September answers differently depending on what you're after. The warmest destinations from Brussels 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 Fethiye

Places to stay in Fethiye, 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 Brussels

September from elsewhere

Questions

Where is the sunniest place to go from Brussels in September?

Fethiye, Turkey, at 11.8 h. Reaching it emits 634 kg CO₂e return, travelling 6h 54m each way by air.

Can I get somewhere sunny from Brussels in September without flying?

Yes. Aix-en-Provence reaches 10.8 h and is reachable by rail or ferry in 13h 12m, emitting 24.2 kg CO₂e return — though Fethiye is sunnier still, if you fly.

How much carbon does a return trip from Brussels to Fethiye produce?

634 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.