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Oslo · September · warmth

Warmest places to go from Oslo in September

In September, the warmest well-known place within 15 hours of Oslo is Aswan, Egypt, averaging 34.1 °C across day and night and 11.5 h sun a day, about 9h 18m each way by air. Without flying, it is Frankfurt (Oder), Germany, averaging 18.2 °C across day and night, about 14h 36m each way by train, for about 39× less carbon (25.8 kg CO₂e return against 1,015 kg).

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

The 10 warmest places within 15 hours of Oslo

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.

  1. Aswan, Egypt34.1 °C · 11.5 h sun a day · mostly dryair ≈ 9h 18m · 1,015 kg CO₂e return
  2. Sharm el-Sheikh, Egypt33.7 °C · 11.5 h sun a day · mostly dry · sea 28.7 °Cair ≈ 8h 48m · 932 kg CO₂e return
  3. Luxor, Egypt33.6 °C · 11.6 h sun a day · mostly dryair ≈ 9h · 974 kg CO₂e return
  4. Aqaba, Jordan31.5 °C · 11.4 h sun a day · mostly dry · sea 27.8 °Cair ≈ 8h 36m · 898 kg CO₂e return
  5. Sanliurfa, Turkey27.7 °C · 11.4 h sun a day · mostly dryair ≈ 7h 48m · 809 kg CO₂e return
  6. Adana, Turkey27.5 °C · 11.1 h sun a day · 1.5 mm rain a dayair ≈ 7h 36m · 777 kg CO₂e return
  7. Famagusta, Cyprus27.1 °C · 11.4 h sun a day · mostly dry · sea 28.6 °Cair ≈ 7h 48m · 811 kg CO₂e return
  8. Kairouan, Tunisia27.0 °C · 10.7 h sun a day · mostly dryair ≈ 7h 6m · 678 kg CO₂e return
  9. Rhodes, Greece27.0 °C · 11.8 h sun a day · mostly dry · sea 27.4 °Cair ≈ 7h 24m · 728 kg CO₂e return
  10. Batman, Turkey26.8 °C · 11.6 h sun a day · mostly dryair ≈ 7h 48m · 818 kg CO₂e return

Without flying

The warmest places the train reaches within 15 hours. Frankfurt (Oder) is 18.2 °C for 25.8 kg — about 39× less carbon than flying to Aswan.

  1. Frankfurt (Oder), Germany18.2 °C · 9.8 h sun a day · 1.2 mm rain a dayrail ≈ 14h 36m · 25.8 kg CO₂e return
  2. Berlin, Germany18.2 °C · 10.0 h sun a day · mostly dryrail ≈ 14h 6m · 24.7 kg CO₂e return
  3. Dessau, Germany18.1 °C · 10.1 h sun a day · 1.4 mm rain a dayrail ≈ 15h · 26.6 kg CO₂e return
  4. Świnoujście, Poland18.1 °C · 9.8 h sun a day · mostly dry · sea 18.7 °Crail ≈ 12h 6m · 20.7 kg CO₂e return
  5. Malbork, Poland18.1 °C · 9.8 h sun a day · mostly dryrail ≈ 13h 54m · 24.3 kg CO₂e return
  6. Bydgoszcz, Poland18.1 °C · 9.9 h sun a day · mostly dryrail ≈ 14h 36m · 25.8 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 Oslo in September within 15 hours is Sharm el-Sheikh, 33.7 °C, costing 932 kg CO₂e return. The lowest-carbon option is Karlstad at 4.9 kg — 190× less carbon, for 19.2 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.

KarlstadSharm el-Sheikh
Where they are. Solid lines are rail or ferry, dashed are flights, from Oslo. Pick one to compare.
Carbon against warmth, September, departing Oslo. Journeys of up to 15 hours each way.18 destinations. Lowest carbon Karlstad at 4.9 kilograms and 14.5 °C; best for warmth Sharm el-Sheikh at 932 kilograms and 33.7 °C. Karlstad · 4.9 kgŚwinoujście · 20.7 kgTrnava · 341 kgSharm el-Sheikh · 932 kg

By rail or ferry By air

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

What the 15-hour limit costs: at this budget Trnava can only be reached by air — 341 kg CO₂e, in 5h 18m. Allow up to 24 hours and the train does the same journey for 40.0 kg in 21h 36m — 9× less carbon for 16h 18m more travelling.

September from Oslo — 18 destinations on the frontier, 4 without flying.
DestinationHowCO₂e returnTempSun/dayRain/dayJourney
Karlstad, SwedenRail4.9 kg14.5 °C8.2 h2.8 mm4h 24m
Frederikshavn, DenmarkRail8.1 kg15.3 °C9.0 h2.6 mm6h
Copenhagen, DenmarkRail14.3 kg16.5 °C10.0 h1.5 mm9h
Świnoujście, PolandRail20.7 kg18.1 °C9.8 h1.0 mm12h 6m
Trnava, SlovakiaAir341 kg19.0 °C9.4 h3.6 mm5h 18m
Trieste, ItalyAir402 kg20.8 °C9.8 h6.4 mm5h 36m
Pula, CroatiaAir424 kg21.8 °C9.8 h4.8 mm5h 42m
Split, CroatiaAir469 kg22.3 °C10.2 h4.7 mm6h
Foggia, ItalyAir523 kg23.2 °C10.3 h2.0 mm6h 18m
Taranto, ItalyAir556 kg24.3 °C11.0 h0.9 mm6h 24m
Palermo, ItalyAir611 kg24.5 °C11.0 h2.1 mm6h 42m
Tunis, TunisiaAir646 kg25.7 °C10.9 h0.9 mm6h 54m
Kairouan, TunisiaAir678 kg27.0 °C10.7 h0.7 mm7h 6m
Metlaoui, TunisiaAir717 kg27.7 °C10.5 h0.3 mm7h 18m
Tozeur, TunisiaAir729 kg29.4 °C10.3 h0.3 mm7h 24m
Al Fayyum, EgyptAir871 kg30.3 °C11.7 h0.0 mm8h 30m
Assiut, EgyptAir927 kg31.6 °C11.7 h0.0 mm8h 48m
Sharm el-Sheikh, EgyptAir932 kg33.7 °C11.5 h0.0 mm8h 48m

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 Świnoujście (20.7 kg, 18.1 °C) to Trnava (341 kg, 19.0 °C) buys 0.9 °C more warmth for an extra 320 kg — 356 kg of CO₂e per degree. That single step is the most expensive warmth on the whole curve.

The pick of them

Karlstad, SwedenKarlstadSweden4.9 kg CO₂e return14.5 °C · 8.2 h sun · 4h 24m by railmild and brightŚwinoujście, PolandŚwinoujściePoland20.7 kg CO₂e return18.1 °C · 9.8 h sun · 12h 6m by railwarm, bright and drySharm el-Sheikh, EgyptSharm el-SheikhEgypt932 kg CO₂e return33.7 °C · 11.5 h sun · 8h 48m 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 Oslo

September from elsewhere

Photo credits

Questions

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

Sharm el-Sheikh, Egypt, at 33.7 °C. Reaching it emits 932 kg CO₂e return, travelling 8h 48m each way by air (modelled).

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

Yes. Świnoujście reaches 18.1 °C and is reachable by rail or ferry in 12h 6m (modelled), emitting 20.7 kg CO₂e return — though Sharm el-Sheikh is warmer still, if you fly.

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

932 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.