Frankfurt · September · warmth

Warmest places to go from Frankfurt in September

In September, the warmest well-known place within 15 hours of Frankfurt is Aswan, Egypt, averaging 34.1 °C across day and night and 11.5 h sun a day, about 8h 18m each way by air. Without flying, it is Civitavecchia, Italy, averaging 22.4 °C across day and night, about 15h each way by train, for about 33× less carbon (27.3 kg CO₂e return against 898 kg).

Every city at once, with and without flying: where is hot in September.

The 10 warmest places within 15 hours of Frankfurt

Ranked on warmth in September alone, among well-known places (a Wikivoyage travel guide and at least 40,000 Wikipedia readers a year), one per area and at most three per country. The carbon is shown, not used to choose: the list further down is the other question, how much warmth each extra kilogram buys.

Aswan, Egypt34.1 °C · 11.5 h sun a day · mostly dryair ≈ 8h 18m · 898 kg CO₂e return
Sharm el-Sheikh, Egypt33.7 °C · 11.5 h sun a day · mostly dry · sea 28.7 °Cair ≈ 7h 54m · 826 kg CO₂e return
Luxor, Egypt33.6 °C · 11.6 h sun a day · mostly dryair ≈ 8h · 856 kg CO₂e return
Aqaba, Jordan31.5 °C · 11.4 h sun a day · mostly dry · sea 27.8 °Cair ≈ 7h 42m · 799 kg CO₂e return
Sanliurfa, Turkey27.7 °C · 11.4 h sun a day · mostly dryair ≈ 7h 12m · 702 kg CO₂e return
Adana, Turkey27.5 °C · 11.1 h sun a day · 1.5 mm rain a dayair ≈ 6h 54m · 647 kg CO₂e return
Famagusta, Cyprus27.1 °C · 11.4 h sun a day · mostly dry · sea 28.6 °Cair ≈ 7h · 662 kg CO₂e return
Kairouan, Tunisia27.0 °C · 10.7 h sun a day · mostly dryair ≈ 5h 36m · 405 kg CO₂e return
Rhodes, Greece27.0 °C · 11.8 h sun a day · mostly dry · sea 27.4 °Cair ≈ 6h 24m · 549 kg CO₂e return
Batman, Turkey26.8 °C · 11.6 h sun a day · mostly dryair ≈ 7h 24m · 729 kg CO₂e return

Without flying

The warmest places the train reaches within 15 hours. Civitavecchia is 22.4 °C for 27.3 kg — about 33× less carbon than flying to Aswan.

Civitavecchia, Italy22.4 °C · 10.6 h sun a day · 1.7 mm rain a day · sea 24.5 °Crail ≈ 15h · 27.3 kg CO₂e return
Rome, Italy22.3 °C · 10.8 h sun a day · 2.6 mm rain a dayrail ≈ 14h 48m · 28.3 kg CO₂e return
Pesaro, Italy22.0 °C · 9.9 h sun a day · 3.7 mm rain a day · sea 24.8 °Crail ≈ 12h 48m · 22.4 kg CO₂e return
Lleida, Spain21.7 °C · 10.5 h sun a day · 2.3 mm rain a dayrail ≈ 15h · 33.4 kg CO₂e return
Barcelona, Spain21.5 °C · 10.2 h sun a day · 2.6 mm rain a day · sea 25.2 °Crail ≈ 13h 12m · 32.3 kg CO₂e return
Nice, France21.2 °C · 10.3 h sun a day · 3.3 mm rain a day · sea 24.2 °Crail ≈ 11h 42m · 21.3 kg CO₂e return

≈ is the model's estimate (air times include getting to and through the airport); ✓ is a rail journey checked against a real timetable, with the date it was checked. Temperatures are historical daily means for 2023–2024, averaged across day and night, so afternoons run warmer.

The low-carbon trade-off

The warmest place you can reach from Frankfurt in September within 15 hours is Sharm el-Sheikh, 33.7 °C, costing 826 kg CO₂e return. The lowest-carbon option is Eisenach at 4.4 kg — 188× less carbon, for 17.0 degrees less warmth.

Every destination here is on the efficiency frontier: nowhere else this site covers is both warmer 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 Frankfurt. Pick one to compare.

By rail or ferry By air

Carbon against warmth, September, departing Frankfurt. Journeys of up to 15 hours each way.

What the 15-hour limit costs: at this budget Foggia can only be reached by air — 276 kg CO₂e, in 5h. Allow up to 24 hours and the train does the same journey for 32.4 kg in 17h 42m — 9× less carbon for 12h 42m more travelling.

September from Frankfurt — 16 destinations on the frontier, 6 without flying.
Destination	How	CO₂e return	Temp	Sun/day	Rain/day	Journey
Eisenach, Germany	Rail	4.4 kg	16.7 °C	10.1 h	2.1 mm	3h 42m
Cologne, Germany	Rail	4.5 kg	17.5 °C	9.8 h	3.0 mm	2h 36m
Bolzano, Italy	Rail	13.2 kg	19.7 °C	9.8 h	6.5 mm	8h 18m
Brescia, Italy	Rail	15.4 kg	20.4 °C	9.7 h	5.3 mm	9h 12m
Chioggia, Italy	Rail	17.9 kg	21.8 °C	10.1 h	3.2 mm	10h 36m
Civitavecchia, Italy	Rail	27.3 kg	22.4 °C	10.6 h	1.7 mm	15h
Foggia, Italy	Air	276 kg	23.2 °C	10.3 h	2.0 mm	5h
Palermo, Italy	Air	348 kg	24.5 °C	11.0 h	2.1 mm	5h 18m
Tunis, Tunisia	Air	373 kg	25.7 °C	10.9 h	0.9 mm	5h 30m
Kairouan, Tunisia	Air	405 kg	27.0 °C	10.7 h	0.7 mm	5h 36m
Metlaoui, Tunisia	Air	442 kg	27.7 °C	10.5 h	0.3 mm	5h 48m
Tozeur, Tunisia	Air	453 kg	29.4 °C	10.3 h	0.3 mm	5h 54m
Al Fayyum, Egypt	Air	746 kg	30.3 °C	11.7 h	0.0 mm	7h 30m
Assiut, Egypt	Air	801 kg	31.6 °C	11.7 h	0.0 mm	7h 42m
Sohag, Egypt	Air	823 kg	32.3 °C	11.7 h	0.0 mm	7h 54m
Sharm el-Sheikh, Egypt	Air	826 kg	33.7 °C	11.5 h	0.0 mm	7h 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 Tozeur (453 kg, 29.4 °C) to Al Fayyum (746 kg, 30.3 °C) buys 0.9 °C more warmth for an extra 293 kg — 326 kg of CO₂e per degree. That single step is the most expensive warmth on the whole curve.

The pick of them

EisenachGermany4.4 kg CO₂e return16.7 °C · 10.1 h sun · 3h 42m by railwarm overall CivitavecchiaItaly27.3 kg CO₂e return22.4 °C · 10.6 h sun · 15h by railwarm overall

Sharm el-SheikhEgypt826 kg CO₂e return33.7 °C · 11.5 h sun · 7h 54m by airwarm, bright and dry

The same month, asked differently

September answers differently depending on what you are after, and the lists genuinely diverge: the brightest places are not the hottest, and in summer the useful question stops being where is warm at all.

Where to stay in Sharm el-Sheikh

Places to stay in Sharm el-Sheikh, Egypt, on a live map. Prices and availability come from Stay22 and its booking partners.

Search places to stay in Sharm el-Sheikh →Opens the booking search in a new tab. Same partners as the map below.

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 Frankfurt

September from elsewhere

Photo credits

Sharm el-Sheikh: Tanya Dedyukhina, CC BY 3.0, via Wikimedia Commons
Aswan: Vyacheslav Argenberg, CC BY 4.0, via Wikimedia Commons
Luxor: Roland Unger, CC BY-SA 3.0, via Wikimedia Commons
Aqaba: Sana Janakat, CC BY-SA 4.0, via Wikimedia Commons
Sanliurfa: Damien Halleux Radermecker, CC BY-SA 2.0, via Wikimedia Commons
Adana: Anatolianpride, Public domain, via Wikimedia Commons
Kairouan: Unknown authorUnknown author, Public domain, via Wikimedia Commons
Rhodes: Bernard Gagnon, CC BY-SA 4.0, via Wikimedia Commons
Batman: Ferhat 72 at Turkish Wikipedia, Public domain, via Wikimedia Commons
Rome: Bert Kaufmann from Roermond, Netherlands, CC BY-SA 2.0, via Wikimedia Commons
Lleida: Jorge Franganillo from Barcelona, Spain, CC BY 2.0, via Wikimedia Commons
Nice: Moody Dreiza (Moody751 at English Wikipedia), CC BY 2.5, via Wikimedia Commons

Questions

Where is the warmest place to go from Frankfurt in September?

Sharm el-Sheikh, Egypt, at 33.7 °C. Reaching it emits 826 kg CO₂e return, travelling 7h 54m each way by air (modelled).

Can I get somewhere warm from Frankfurt in September without flying?

Yes. Civitavecchia reaches 22.4 °C and is reachable by rail or ferry in 15h (modelled), emitting 27.3 kg CO₂e return — though Sharm el-Sheikh is warmer still, if you fly.

How much carbon does a return trip from Frankfurt to Sharm el-Sheikh produce?

826 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.