London · June · warmth

Warmest places to go from London in June

The warmest place you can reach from London in June within 15 hours is Edfu at 36.2 °C, costing 951 kg CO₂e return. The lowest-carbon option is Calais at 4.5 kg — 211× less carbon for 20.0 °C less.

Every destination here is on the efficiency frontier: nowhere else in Europe is both warmer in June 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 London. Pick one to compare.

By rail or ferry By air

Carbon against warmth, June, 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 22h 54m — 9× less carbon for 17h 24m more travelling.

June from London — 20 destinations on the frontier, 8 without flying.
Destination	How	CO₂e return	Temp	Sun/day	Rain/day	Journey
Calais, France	Rail	4.5 kg	16.2 °C	12.7 h	1.0 mm	4h 6m
Lille, France	Rail	7.2 kg	17.5 °C	12.3 h	2.2 mm	5h 18m
Antwerp, Belgium	Rail	9.3 kg	18.0 °C	12.2 h	2.4 mm	6h 18m
Le Mans, France	Rail	11.5 kg	18.9 °C	12.5 h	1.6 mm	7h 18m
Bourges, France	Rail	15.5 kg	19.5 °C	12.0 h	3.9 mm	9h 12m
Lyon, France	Rail	21.8 kg	20.4 °C	12.2 h	3.0 mm	12h 6m
Montpellier, France	Rail	27.4 kg	22.3 °C	12.5 h	2.1 mm	14h 42m
Béziers, France	Rail	27.8 kg	22.5 °C	12.7 h	1.7 mm	14h 54m
Zaragoza, Spain	Air	276 kg	23.4 °C	12.4 h	1.9 mm	5h
Alzira, Spain	Air	346 kg	24.7 °C	12.6 h	0.9 mm	5h 18m
Andujar, Spain	Air	385 kg	25.7 °C	12.6 h	0.9 mm	5h 30m
Kairouan, Tunisia	Air	488 kg	27.2 °C	11.9 h	0.6 mm	6h 6m
Gafsa, Tunisia	Air	511 kg	28.6 °C	12.5 h	0.3 mm	6h 12m
Metlaoui, Tunisia	Air	511 kg	29.8 °C	12.5 h	0.0 mm	6h 12m
Tozeur, Tunisia	Air	520 kg	31.2 °C	12.5 h	0.0 mm	6h 18m
Zagora, Morocco	Air	604 kg	32.1 °C	12.7 h	0.0 mm	6h 42m
Assiut, Egypt	Air	881 kg	33.7 °C	12.5 h	0.0 mm	8h 30m
Sohag, Egypt	Air	901 kg	34.5 °C	12.6 h	0.0 mm	8h 36m
Luxor, Egypt	Air	932 kg	35.9 °C	12.7 h	0.0 mm	8h 48m
Edfu, Egypt	Air	951 kg	36.2 °C	12.6 h	0.0 mm	8h 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 Béziers (27.8 kg, 22.5 °C) to Zaragoza (276 kg, 23.4 °C) buys 0.9 °C more warmth for an extra 248 kg — 276 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 return16.2 °C · 12.7 h sun · 4h 6m by railwarm, bright and dry BéziersFrance27.8 kg CO₂e return22.5 °C · 12.7 h sun · 14h 54m by railwarm overall EdfuEgypt951 kg CO₂e return36.2 °C · 12.6 h sun · 8h 54m by airwarm, bright and dry

If you'd rather have sunshine than heat

June answers differently depending on what you're after. The sunniest destinations from London in June are a different list — the brightest places are not always the hottest, and in winter the difference is large.

Where to stay in Edfu

Places to stay in Edfu, Egypt, 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 London

June from elsewhere

Questions

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

Edfu, Egypt, at 36.2 °C. Reaching it emits 951 kg CO₂e return, travelling 8h 54m each way by air.

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

Yes. Béziers reaches 22.5 °C and is reachable by rail or ferry in 14h 54m, emitting 27.8 kg CO₂e return — though Edfu is warmer still, if you fly.

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

951 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.