London
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Reaching London from Brussels emits 9.5 kg CO₂e return by rail (4h 6m each way) against 80.6 kg by air — 8× the carbon. It averages 18.0 °C in August and 5.0 °C in January.
When to go: London is warmest in August (18.0 °C), sunniest in June (12.9 h a day); coldest in January (5.0 °C). Month by month
Getting there
| From | Distance | By rail | Rail time | By air | Air time |
|---|---|---|---|---|---|
| Amsterdam | 357 km | 10.6 kg | 6h | 89.8 kg | 4h |
| Barcelona | 1,139 km | 33.6 kg | 12h 30m | 286 kg | 5h |
| Berlin | 932 km | 27.5 kg | 12h 24m | 234 kg | 4h 42m |
| Birmingham | 163 km | 13.1 kg | 2h 54m | 74.6 kg | 3h 42m |
| Bristol | 171 km | 13.8 kg | 3h 6m | 78.5 kg | 3h 42m |
| Brussels | 320 km | 9.5 kg | 4h 6m | 80.6 kg | 3h 54m |
| Cardiff | 211 km | 17.0 kg | 3h 24m | 97.0 kg | 3h 48m |
| Copenhagen | 955 km | 28.2 kg | 18h | 240 kg | 4h 48m |
| Dublin | 462 km | — | — | 116 kg | 4h 6m |
| Edinburgh | 534 km | 42.9 kg | 5h 48m | 245 kg | 4h 12m |
| Frankfurt | 638 km | 18.8 kg | 8h 12m | 160 kg | 4h 24m |
| Glasgow | 555 km | 44.6 kg | 6h | 255 kg | 4h 12m |
| Leeds | 272 km | 21.9 kg | 3h 42m | 125 kg | 3h 54m |
| Lisbon | 1,585 km | 46.8 kg | 30h | 399 kg | 5h 36m |
| Liverpool | 286 km | 23.0 kg | 3h 42m | 131 kg | 3h 54m |
| Madrid | 1,264 km | 37.3 kg | 16h 6m | 318 kg | 5h 12m |
| Manchester | 262 km | 21.0 kg | 3h 36m | 120 kg | 3h 48m |
| Milan | 959 km | 28.3 kg | 12h 48m | 241 kg | 4h 48m |
| Munich | 918 km | 27.1 kg | 11h 36m | 231 kg | 4h 42m |
| Newcastle | 398 km | 32.0 kg | 4h 18m | 182 kg | 4h |
| Nottingham | 175 km | 14.1 kg | 3h 12m | 80.3 kg | 3h 42m |
| Oslo | 1,153 km | 34.1 kg | 27h 36m | 290 kg | 5h |
| Paris | 344 km | 10.2 kg | 4h 24m | 86.5 kg | 4h |
| Prague | 1,033 km | 30.5 kg | 17h 54m | 260 kg | 4h 54m |
| Rome | 1,435 km | 42.4 kg | 16h 54m | 361 kg | 5h 24m |
| Sheffield | 227 km | 18.3 kg | 3h 30m | 104 kg | 3h 48m |
| Stockholm | 1,433 km | 42.3 kg | 24h 24m | 360 kg | 5h 24m |
| Vienna | 1,235 km | 36.5 kg | 16h 42m | 311 kg | 5h 6m |
| Warsaw | 1,448 km | 42.8 kg | 19h 54m | 364 kg | 5h 24m |
| Zurich | 777 km | 23.0 kg | 9h 54m | 196 kg | 4h 30m |
The year in London
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp °C | 5.0 | 7.2 | 7.9 | 9.4 | 13.3 | 16.8 | 17.5 | 18.0 | 16.6 | 12.7 | 7.9 | 7.6 |
| Sun h/day | 4.7 | 4.2 | 5.2 | 8.3 | 10.2 | 12.9 | 10.6 | 10.2 | 8.6 | 6.4 | 4.3 | 2.7 |
| Rain mm/day | 2.0 | 2.1 | 2.9 | 2.2 | 1.8 | 1.1 | 2.8 | 1.4 | 3.8 | 2.8 | 2.5 | 1.9 |
When to go
London is warmest in August at 18.0 °C but brightest in June, averaging 12.9 hours of sun a day — the two do not always coincide, which is worth knowing before booking. Its coldest is January at 5.0 °C.
Three months worth booking
The same year of measurements, decided rather than tabulated. Each opens the map below on dates in that month.
Staying there
A hotel room in United Kingdom emits about 10.4 kg CO₂e per night under UK Government 2026 factors — a country average per occupied room, not this or any particular hotel. 7 nights in one room adds roughly 73 kg — about 7.7× the carbon of one person getting there by rail from Brussels. Two sharing the room halve that share each; the journey does not halve.
Where to stay in London
Places to stay in London, United Kingdom, on a live map. Prices and availability come from Stay22 and its booking partners.
Search places to stay in London →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.
Distances are great-circle. Rail assumes international rail at 0.01135 kg CO₂e per passenger-km with a 1.3× track detour allowance; flights use 0.12576 kg per passenger-km including radiative forcing. Journey times are modelled, not timetabled. Full method.