Rennes
Reaching Rennes from Paris emits 9.1 kg CO₂e return by rail (6h 12m each way) against 77.4 kg by air — 9× the carbon. It averages 18.9 °C in August and 5.9 °C in January.
Getting there
| From | Distance | By rail | Rail time | By air | Air time |
|---|---|---|---|---|---|
| Amsterdam | 665 km | 19.6 kg | 11h 6m | 167 kg | 4h 24m |
| Barcelona | 806 km | 23.8 kg | 13h | 203 kg | 4h 36m |
| Berlin | 1,175 km | 34.7 kg | 18h 6m | 296 kg | 5h 6m |
| Birmingham | 486 km | 24.7 kg | 9h 36m | 122 kg | 4h 6m |
| Bristol | 378 km | 25.4 kg | 9h 42m | 95.0 kg | 4h |
| Brussels | 531 km | 15.7 kg | 9h 18m | 134 kg | 4h 12m |
| Cardiff | 390 km | 28.6 kg | 10h 18m | 98.1 kg | 4h |
| Copenhagen | 1,285 km | 37.9 kg | 19h 36m | 323 kg | 5h 12m |
| Dublin | 664 km | — | — | 167 kg | 4h 24m |
| Edinburgh | 878 km | 54.5 kg | 14h 42m | 221 kg | 4h 42m |
| Frankfurt | 785 km | 23.2 kg | 12h 42m | 198 kg | 4h 30m |
| Glasgow | 880 km | 56.3 kg | 15h | 221 kg | 4h 42m |
| Leeds | 632 km | 33.5 kg | 11h 6m | 159 kg | 4h 18m |
| Lisbon | 1,204 km | 35.5 kg | 18h 30m | 303 kg | 5h 6m |
| Liverpool | 596 km | 34.6 kg | 11h 18m | 150 kg | 4h 18m |
| London | 394 km | 11.6 kg | 7h 24m | 99.0 kg | 4h |
| Madrid | 871 km | 25.7 kg | 13h 54m | 219 kg | 4h 42m |
| Manchester | 598 km | 32.7 kg | 11h | 151 kg | 4h 18m |
| Milan | 877 km | 25.9 kg | 14h | 221 kg | 4h 42m |
| Munich | 982 km | 29.0 kg | 15h 24m | 247 kg | 4h 48m |
| Newcastle | 763 km | 43.6 kg | 12h 48m | 192 kg | 4h 30m |
| Nottingham | 540 km | 25.7 kg | 9h 48m | 136 kg | 4h 12m |
| Oslo | 1,537 km | 45.4 kg | 23h | 387 kg | 5h 30m |
| Paris | 308 km | 9.1 kg | 6h 12m | 77.4 kg | 3h 54m |
| Prague | 1,190 km | 35.1 kg | 18h 18m | 299 kg | 5h 6m |
| Rome | 1,309 km | 38.6 kg | 19h 54m | 329 kg | 5h 12m |
| Sheffield | 586 km | 29.9 kg | 10h 30m | 148 kg | 4h 18m |
| Southampton | 311 km | 20.6 kg | 8h 54m | 78.3 kg | 3h 54m |
| Stockholm | 1,788 km | 52.8 kg | 26h 30m | 450 kg | 5h 54m |
| Vienna | 1,336 km | 39.4 kg | 20h 18m | 336 kg | 5h 18m |
| Warsaw | 1,672 km | 49.3 kg | 24h 54m | 420 kg | 5h 42m |
| Zurich | 768 km | 22.7 kg | 12h 30m | 193 kg | 4h 30m |
The year in Rennes
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp °C | 5.9 | 7.7 | 8.9 | 10.6 | 14.1 | 17.9 | 18.2 | 18.9 | 17.2 | 13.9 | 9.8 | 7.8 |
| Sun h/day | 5.1 | 4.9 | 6.9 | 8.8 | 10.9 | 12.4 | 10.4 | 10.3 | 8.8 | 6.9 | 4.4 | 4.0 |
| Rain mm/day | 2.6 | 2.0 | 3.4 | 2.3 | 2.5 | 1.8 | 2.6 | 1.9 | 2.6 | 3.7 | 2.9 | 1.9 |
When to go
Rennes is warmest in August at 18.9 °C but brightest in June, averaging 12.4 hours of sun a day — the two do not always coincide, which is worth knowing before booking. Its coldest is January at 5.9 °C.
Staying there
A hotel room in France emits about 6.7 kg CO₂e per night under UK Government 2026 factors, so a week adds roughly 47 kg — about 5.2× the carbon of getting there by rail from Paris.
How busy it gets
Ille-et-Vilaine records 5 overnight stays per resident a year (5,665,322 nights in 2025). Comparatively quiet by European standards.
Eurostat, nights spent at tourist accommodation by NUTS 3 region, against resident population. Shown for context only — it plays no part in which destinations appear or in what order. Eurostat does not cover the United Kingdom after 2016, nor North Africa or the Levant at all, so this figure is absent for roughly a third of the destinations here.
Where to stay in Rennes
Places to stay in Rennes, France, 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.
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.