Leiden
Reaching Leiden from London emits 9.6 kg CO₂e return by rail (7h 12m each way) against 81.9 kg by air — 9× the carbon. It averages 18.4 °C in August and 5.0 °C in January.
Leiden (historically known as Leyden) is easily one of the most enchanting cities in the Netherlands. — Wikivoyage, CC BY-SA 4.0
When to go: Leiden is warmest in August (18.4 °C), sunniest in June (12.4 h a day); coldest in January (5.0 °C). Month by month
Getting there
| From | Distance | By rail | Rail time | By air | Air time |
|---|---|---|---|---|---|
| Barcelona | 1,210 km | 35.7 kg | 14h | 305 kg | 5h 6m |
| Berlin | 607 km | 17.9 kg | 8h 24m | 153 kg | 4h 18m |
| Birmingham | 436 km | 22.7 kg | 9h 54m | 110 kg | 4h 6m |
| Bristol | 493 km | 23.4 kg | 10h 12m | 124 kg | 4h 12m |
| Cardiff | 533 km | 26.6 kg | 10h 30m | 134 kg | 4h 12m |
| Copenhagen | 657 km | 19.4 kg | 11h 30m | 165 kg | 4h 24m |
| Dublin | 734 km | — | — | 185 kg | 4h 30m |
| Edinburgh | 655 km | 52.5 kg | 12h 54m | 165 kg | 4h 24m |
| Frankfurt | 370 km | 10.9 kg | 6h 30m | 93.1 kg | 4h |
| Glasgow | 704 km | 54.3 kg | 13h 6m | 177 kg | 4h 24m |
| Leeds | 443 km | 31.5 kg | 10h 48m | 112 kg | 4h 6m |
| Lisbon | 1,828 km | 53.9 kg | 28h 12m | 460 kg | 5h 54m |
| Liverpool | 521 km | 32.6 kg | 10h 48m | 131 kg | 4h 12m |
| London | 325 km | 9.6 kg | 7h 12m | 81.9 kg | 3h 54m |
| Madrid | 1,447 km | 42.7 kg | 17h 36m | 364 kg | 5h 24m |
| Manchester | 475 km | 30.7 kg | 10h 42m | 120 kg | 4h 6m |
| Milan | 820 km | 24.2 kg | 13h 48m | 206 kg | 4h 36m |
| Munich | 674 km | 19.9 kg | 11h 6m | 169 kg | 4h 24m |
| Newcastle | 510 km | 41.6 kg | 11h 24m | 128 kg | 4h 12m |
| Nottingham | 392 km | 23.7 kg | 10h 18m | 98.5 kg | 4h |
| Oslo | 945 km | 27.9 kg | 15h 36m | 238 kg | 4h 48m |
| Paris | 398 km | 11.7 kg | 6h | 100 kg | 4h |
| Prague | 729 km | 21.5 kg | 12h 36m | 184 kg | 4h 30m |
| Rome | 1,291 km | 38.1 kg | 17h 18m | 325 kg | 5h 12m |
| Sheffield | 423 km | 27.9 kg | 10h 36m | 107 kg | 4h 6m |
| Southampton | 431 km | 18.6 kg | 9h 54m | 108 kg | 4h 6m |
| Stockholm | 1,161 km | 34.3 kg | 16h 48m | 292 kg | 5h |
| Vienna | 951 km | 28.1 kg | 15h 48m | 239 kg | 4h 48m |
| Warsaw | 1,124 km | 33.2 kg | 15h 54m | 283 kg | 5h |
| Zurich | 607 km | 17.9 kg | 10h 42m | 153 kg | 4h 18m |
The year in Leiden
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp °C | 5.0 | 6.8 | 7.6 | 9.3 | 13.7 | 16.9 | 17.7 | 18.4 | 17.0 | 12.9 | 7.9 | 6.7 |
| Sun h/day | 3.8 | 4.1 | 5.9 | 9.0 | 11.7 | 12.4 | 11.5 | 11.4 | 9.3 | 6.0 | 3.9 | 2.4 |
| Rain mm/day | 3.2 | 2.7 | 3.1 | 3.3 | 3.9 | 1.6 | 4.4 | 2.6 | 3.7 | 3.4 | 4.8 | 3.5 |
| Sea °C | 7.8 | 6.9 | 7.9 | 9.7 | 12.7 | 15.8 | 18.3 | 19.6 | 19.3 | 16.2 | 12.4 | 8.8 |
When to go
Leiden is warmest in August at 18.4 °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 5.0 °C.
On these lists
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 The Netherlands emits about 14.8 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 104 kg — about 10.8× the carbon of one person getting there by rail from London. Two sharing the room halve that share each; the journey does not halve.
How busy it gets
Agglomeratie Leiden en Bollenstreek records 5.8 overnight stays per resident a year (2,606,917 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 Leiden
Places to stay in Leiden, The Netherlands, on a live map. Prices and availability come from Stay22 and its booking partners.
Search places to stay in Leiden →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.