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London · July · warmth

Warmest places to go from London in July

In July, the warmest well-known place within 15 hours of London is Aswan, Egypt, averaging 36.0 °C across day and night and 12.2 h sun a day, about 9h each way by air. Without flying, it is Lleida, Spain, averaging 27.6 °C across day and night, about 14h 18m each way by train, for about 30× less carbon (32.5 kg CO₂e return against 970 kg).

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

The 10 warmest places within 15 hours of London

Ranked on warmth in July 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, Egypt36.0 °C · 12.2 h sun a day · mostly dryair ≈ 9h · 970 kg CO₂e return
  2. Sharm el-Sheikh, Egypt35.9 °C · 13.0 h sun a day · mostly dry · sea 29.5 °Cair ≈ 8h 42m · 909 kg CO₂e return
  3. Luxor, Egypt35.8 °C · 12.4 h sun a day · mostly dryair ≈ 8h 48m · 932 kg CO₂e return
  4. Aqaba, Jordan34.8 °C · 13.1 h sun a day · mostly dry · sea 28.2 °Cair ≈ 8h 30m · 886 kg CO₂e return
  5. Kairouan, Tunisia32.8 °C · 12.9 h sun a day · mostly dryair ≈ 6h 6m · 488 kg CO₂e return
  6. Sanliurfa, Turkey32.8 °C · 13.4 h sun a day · mostly dryair ≈ 8h 6m · 862 kg CO₂e return
  7. Batman, Turkey32.2 °C · 13.3 h sun a day · mostly dryair ≈ 8h 12m · 889 kg CO₂e return
  8. Marmaris, Turkey31.9 °C · 13.9 h sun a day · mostly dryair ≈ 7h 12m · 695 kg CO₂e return
  9. Tataouine, Tunisia31.8 °C · 12.9 h sun a day · mostly dryair ≈ 6h 30m · 563 kg CO₂e return
  10. Ouarzazate, Morocco31.6 °C · 12.0 h sun a day · mostly dryair ≈ 6h 36m · 593 kg CO₂e return

Without flying

The warmest places the train reaches within 15 hours. Lleida is 27.6 °C for 32.5 kg — about 30× less carbon than flying to Aswan.

  1. Lleida, Spain27.6 °C · 13.6 h sun a day · 1.5 mm rain a dayrail ≈ 14h 18m · 32.5 kg CO₂e return
  2. Zaragoza, Spain27.1 °C · 13.7 h sun a day · mostly dryrail ≈ 14h · 32.4 kg CO₂e return
  3. Cannes, France26.4 °C · 14.3 h sun a day · mostly dry · sea 25.5 °Crail ≈ 11h 30m · 30.5 kg CO₂e return
  4. Bologna, Italy26.4 °C · 13.7 h sun a day · 1.6 mm rain a dayrail ≈ 15h · 34.1 kg CO₂e return
  5. Toulon, France26.2 °C · 14.0 h sun a day · mostly dry · sea 23.4 °Crail ≈ 9h 42m · 30.6 kg CO₂e return
  6. Avignon, France25.4 °C · 13.7 h sun a day · mostly dryrail 8h 42m ✓ · 27.1 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 London in July within 15 hours is Nefta, 36.0 °C, costing 519 kg CO₂e return. The lowest-carbon option is Calais at 4.5 kg — 115× less carbon, for 18.2 degrees less warmth.

Every destination here is on the efficiency frontier: nowhere else this site covers is both warmer in July and lower in carbon. Anything a better option beats outright has been left out.

CalaisNefta
Where they are. Solid lines are rail or ferry, dashed are flights, from London. Pick one to compare.
Carbon against warmth, July, departing London. Journeys of up to 15 hours each way.17 destinations. Lowest carbon Calais at 4.5 kilograms and 17.8 °C; best for warmth Nefta at 519 kilograms and 36.0 °C. Calais · 4.5 kgLleida · 32.5 kgAranjuez · 328 kgNefta · 519 kg

By rail or ferry By air

Carbon against warmth, July, departing London. Journeys of up to 15 hours each way.

What the 15-hour limit costs: at this budget Andujar can only be reached by air — 385 kg CO₂e, in 5h 30m. Allow up to 24 hours and the train does the same journey for 45.1 kg in 20h 12m — 9× less carbon for 14h 42m more travelling.

July from London — 17 destinations on the frontier, 11 without flying.
DestinationHowCO₂e returnTempSun/dayRain/dayJourney
Calais, FranceRail4.5 kg17.8 °C11.1 h2.4 mm5h 24m
Amiens, FranceRail7.3 kg18.7 °C10.8 h2.4 mm5h 30m
Paris, FranceRail10.2 kg20.0 °C11.2 h2.6 mm4h 24m
Bourges, FranceRail15.5 kg20.3 °C11.4 h2.7 mm8h 12m
Chalon-sur-Saône, FranceRail18.8 kg21.2 °C12.4 h2.9 mm8h 54m
Lyon, FranceRail21.8 kg22.5 °C13.0 h3.1 mm7h 54m ✓
Romans-sur-Isère, FranceRail24.0 kg23.5 °C13.7 h1.6 mm9h 24m
Orange, FranceRail26.5 kg25.3 °C13.7 h0.9 mm9h 24m
Avignon, FranceRail27.1 kg25.4 °C13.7 h1.0 mm8h 42m ✓
Zaragoza, SpainRail32.4 kg27.1 °C13.7 h0.2 mm14h
Lleida, SpainRail32.5 kg27.6 °C13.6 h1.5 mm14h 18m
Aranjuez, SpainAir328 kg28.9 °C14.0 h0.0 mm5h 12m
Andujar, SpainAir385 kg30.9 °C13.6 h0.0 mm5h 30m
Kairouan, TunisiaAir488 kg32.8 °C12.9 h0.0 mm6h 6m
Gafsa, TunisiaAir511 kg33.3 °C12.9 h0.0 mm6h 12m
Metlaoui, TunisiaAir511 kg34.3 °C12.9 h0.0 mm6h 12m
Nefta, TunisiaAir519 kg36.0 °C12.9 h0.0 mm6h 18m

The flights, in practice

The model measures to the town, not to a runway. For the destinations above reached by air, this is the nearest airport, how far it is, and whether a direct flight from London is listed on the airport's own destination page (researched 2026-09-15; route existence, not availability on a date). "Not checked" means no destination list was read for that airport.

Airports for the air destinations on this frontier, checked 2026-09-15.
DestinationAirportFrom townDirect from LondonOnward
Aranjuez, SpainAdolfo Suárez Madrid–Barajas MAD55 kmyes LHR, LGW, LCY, LTN, STNTrain or metro into Madrid, then Cercanías C3 to Aranjuez.
Andujar, SpainCórdoba ODB120 kmnoGround transfer to Córdoba station, then regional train to Andújar.
Kairouan, TunisiaEnfidha–Hammamet NBE70 kmnot checkedRoad transfer to Kairouan; a direct scheduled public-transport link was not found.
Gafsa, TunisiaTozeur–Nefta TOE95 kmnot checkedRoad transfer from Tozeur; current scheduled passenger service at Gafsa Airport was not established.
Metlaoui, TunisiaTozeur–Nefta TOE55 kmnot checkedRoad transfer from Tozeur; Gafsa Airport's current scheduled service was not established.
Nefta, TunisiaTozeur–Nefta TOE25 kmnot checkedTaxi or road transfer from the airport.
Sources for this table

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 Lleida (32.5 kg, 27.6 °C) to Aranjuez (328 kg, 28.9 °C) buys 1.3 °C more warmth for an extra 296 kg — 227 kg of CO₂e per degree. That single step is the most expensive warmth on the whole curve.

The pick of them

CalaisFrance4.5 kg CO₂e return17.8 °C · 11.1 h sun · 5h 24m by railwarm overallLleida, SpainLleidaSpain32.5 kg CO₂e return27.6 °C · 13.6 h sun · 14h 18m by railwarm overallNefta, TunisiaNeftaTunisia519 kg CO₂e return36.0 °C · 12.9 h sun · 6h 18m by airwarm, bright and dry

The same month, asked differently

July 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 Nefta

Places to stay in Nefta, Tunisia, on a live map. Prices and availability come from Stay22 and its booking partners.

Search places to stay in Nefta →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 London

July from elsewhere

Photo credits

Questions

Where is the warmest place to go from London in July?

Nefta, Tunisia, at 36.0 °C. Reaching it emits 519 kg CO₂e return, travelling 6h 18m each way by air (modelled).

Can I get somewhere warm from London in July without flying?

Yes. Lleida reaches 27.6 °C and is reachable by rail or ferry in 14h 18m (modelled), emitting 32.5 kg CO₂e return — though Nefta is warmer still, if you fly.

How much carbon does a return trip from London to Nefta produce?

519 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.