Jena
Reaching Jena from London emits 24.1 kg CO₂e return by rail (12h 6m each way) against 206 kg by air — 9× the carbon. It averages 20.6 °C in August and 3.1 °C in January.
Jena is a city in the central German state of Thuringia (Thüringen). — Wikivoyage, CC BY-SA 4.0
When to go: Jena is warmest in August (20.6 °C), sunniest in June (12.2 h a day); coldest in January (3.1 °C). Month by month
Getting there
| From | Distance | By rail | Rail time | By air | Air time |
|---|---|---|---|---|---|
| Amsterdam | 489 km | 14.4 kg | 9h 6m | 123 kg | 4h 12m |
| Barcelona | 1,283 km | 37.9 kg | 17h 6m | 323 kg | 5h 12m |
| Berlin | 217 km | 6.4 kg | 4h 18m | 54.6 kg | 3h 48m |
| Birmingham | 944 km | 37.2 kg | 14h 54m | 237 kg | 4h 48m |
| Bristol | 989 km | 37.9 kg | 15h 6m | 249 kg | 4h 48m |
| Brussels | 508 km | 15.0 kg | 8h 24m | 128 kg | 4h 12m |
| Cardiff | 1,029 km | 41.1 kg | 15h 24m | 259 kg | 4h 54m |
| Copenhagen | 532 km | 15.7 kg | 9h 42m | 134 kg | 4h 12m |
| Dublin | 1,243 km | — | — | 313 kg | 5h 12m |
| Edinburgh | 1,124 km | 67.0 kg | 17h 54m | 283 kg | 5h |
| Frankfurt | 224 km | 6.6 kg | 4h 48m | 56.4 kg | 3h 48m |
| Glasgow | 1,182 km | 68.8 kg | 18h | 297 kg | 5h 6m |
| Leeds | 946 km | 46.0 kg | 15h 42m | 238 kg | 4h 48m |
| Lisbon | 2,112 km | 62.3 kg | 32h 30m | 531 kg | 6h 18m |
| Liverpool | 1,029 km | 47.2 kg | 15h 42m | 259 kg | 4h 54m |
| London | 818 km | 24.1 kg | 12h 6m | 206 kg | 4h 36m |
| Madrid | 1,661 km | 49.0 kg | 20h 42m | 418 kg | 5h 42m |
| Manchester | 982 km | 45.2 kg | 15h 36m | 247 kg | 4h 48m |
| Milan | 633 km | 18.7 kg | 11h 6m | 159 kg | 4h 18m |
| Munich | 310 km | 9.2 kg | 5h 36m | 78.1 kg | 3h 54m |
| Newcastle | 990 km | 56.1 kg | 16h 24m | 249 kg | 4h 48m |
| Nottingham | 901 km | 38.2 kg | 15h 12m | 227 kg | 4h 42m |
| Oslo | 1,000 km | 29.5 kg | 16h 24m | 252 kg | 4h 48m |
| Paris | 700 km | 20.7 kg | 9h | 176 kg | 4h 24m |
| Prague | 221 km | 6.5 kg | 5h 12m | 55.6 kg | 3h 48m |
| Rome | 1,007 km | 29.7 kg | 14h 36m | 253 kg | 4h 48m |
| Sheffield | 930 km | 42.4 kg | 15h 30m | 234 kg | 4h 42m |
| Southampton | 910 km | 33.1 kg | 14h 48m | 229 kg | 4h 42m |
| Stockholm | 1,020 km | 30.1 kg | 14h 42m | 257 kg | 4h 54m |
| Vienna | 459 km | 13.5 kg | 8h 42m | 115 kg | 4h 6m |
| Warsaw | 666 km | 19.7 kg | 10h 54m | 168 kg | 4h 24m |
| Zurich | 454 km | 13.4 kg | 8h 30m | 114 kg | 4h 6m |
The year in Jena
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp °C | 3.1 | 5.6 | 7.2 | 9.6 | 14.7 | 18.5 | 20.5 | 20.6 | 17.8 | 12.9 | 6.1 | 4.0 |
| Sun h/day | 3.0 | 4.2 | 6.5 | 8.3 | 10.6 | 12.2 | 11.8 | 10.6 | 9.8 | 6.2 | 3.7 | 3.3 |
| Rain mm/day | 1.4 | 2.0 | 2.0 | 2.0 | 2.4 | 3.2 | 2.2 | 2.8 | 1.7 | 2.3 | 2.0 | 2.0 |
When to go
Jena is warmest in August at 20.6 °C but brightest in June, averaging 12.2 hours of sun a day — the two do not always coincide, which is worth knowing before booking. Its coldest is January at 3.1 °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 Germany emits about 13.2 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 92 kg — about 14.4× the carbon of one person getting there by rail from Berlin. Two sharing the room halve that share each; the journey does not halve.
How busy it gets
Jena, Kreisfreie Stadt records 3.5 overnight stays per resident a year (383,757 nights in 2024). 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 Jena
Places to stay in Jena, Germany, on a live map. Prices and availability come from Stay22 and its booking partners.
Search places to stay in Jena →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.