Helsinki
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Reaching Helsinki from London emits 53.7 kg CO₂e return by rail (34h 48m each way) against 458 kg by air — 9× the carbon. It averages 17.5 °C in August and -4.4 °C in January.
Helsinki (Swedish: Helsingfors) is Finland's capital and largest city. — Wikivoyage, CC BY-SA 4.0
When to go: Helsinki is warmest in August (17.5 °C), sunniest in June (16.0 h a day); coldest in January (-4.4 °C). Month by month
Getting there
| From | Distance | By rail | Rail time | By air | Air time |
|---|---|---|---|---|---|
| Amsterdam | 1,501 km | 44.3 kg | 30h 48m | 378 kg | 5h 30m |
| Barcelona | 2,604 km | 76.8 kg | 40h 36m | 655 kg | 7h |
| Berlin | 1,105 km | 32.6 kg | 25h 18m | 278 kg | 5h |
| Birmingham | 1,844 km | 66.8 kg | 37h 36m | 464 kg | 6h |
| Bristol | 1,954 km | 67.5 kg | 37h 48m | 491 kg | 6h 6m |
| Brussels | 1,648 km | 48.6 kg | 31h 6m | 414 kg | 5h 42m |
| Cardiff | 1,983 km | 70.7 kg | 38h 6m | 499 kg | 6h 6m |
| Copenhagen | 883 km | 26.1 kg | 17h 12m | 222 kg | 4h 42m |
| Dublin | 2,024 km | — | — | 509 kg | 6h 12m |
| Edinburgh | 1,705 km | 96.6 kg | 40h 36m | 429 kg | 5h 48m |
| Frankfurt | 1,514 km | 44.7 kg | 27h 48m | 381 kg | 5h 30m |
| Glasgow | 1,768 km | 98.4 kg | 40h 42m | 445 kg | 5h 54m |
| Leeds | 1,739 km | 75.6 kg | 38h 24m | 437 kg | 5h 48m |
| Lisbon | 3,360 km | 99.2 kg | 58h 6m | 845 kg | 8h |
| Liverpool | 1,841 km | 76.8 kg | 38h 24m | 463 kg | 6h |
| London | 1,821 km | 53.7 kg | 34h 48m | 458 kg | 5h 54m |
| Madrid | 2,948 km | 87.0 kg | 44h 12m | 742 kg | 7h 24m |
| Manchester | 1,796 km | 74.8 kg | 38h 18m | 452 kg | 5h 54m |
| Milan | 1,937 km | 57.2 kg | 38h 6m | 487 kg | 6h 6m |
| Munich | 1,589 km | 46.9 kg | 30h 12m | 400 kg | 5h 36m |
| Newcastle | 1,671 km | 85.7 kg | 39h 6m | 420 kg | 5h 42m |
| Nottingham | 1,772 km | 67.8 kg | 37h 54m | 446 kg | 5h 54m |
| Oslo | 787 km | 23.2 kg | 17h 54m | 198 kg | 4h 30m |
| Paris | 1,909 km | 56.3 kg | 32h 30m | 480 kg | 6h |
| Prague | 1,302 km | 38.4 kg | 31h 42m | 327 kg | 5h 12m |
| Rome | 2,202 km | 65.0 kg | 42h 12m | 554 kg | 6h 24m |
| Sheffield | 1,761 km | 72.0 kg | 38h 12m | 443 kg | 5h 48m |
| Southampton | 1,932 km | 62.7 kg | 37h 30m | 486 kg | 6h 6m |
| Stockholm | 396 km | 11.7 kg | 11h 24m | 99.5 kg | 4h |
| Vienna | 1,439 km | 42.5 kg | 31h 12m | 362 kg | 5h 24m |
| Warsaw | 915 km | 27.0 kg | 23h 18m | 230 kg | 4h 42m |
| Zurich | 1,775 km | 52.4 kg | 33h 48m | 446 kg | 5h 54m |
The year in Helsinki
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp °C | -4.4 | -2.8 | -1.2 | 3.6 | 11.0 | 16.2 | 17.3 | 17.5 | 15.3 | 7.0 | 2.1 | -1.6 |
| Sun h/day | 1.4 | 2.9 | 5.7 | 9.0 | 14.4 | 16.0 | 13.3 | 11.2 | 9.2 | 5.2 | 2.0 | 1.1 |
| Rain mm/day | 2.4 | 2.4 | 1.9 | 1.7 | 0.8 | 1.1 | 2.7 | 3.2 | 3.1 | 2.9 | 2.9 | 2.4 |
| Sea °C | 1.5 | 1.2 | 0.9 | 1.9 | 6.4 | 13.5 | 15.8 | 17.9 | 17.1 | 12.5 | 7.7 | 4.5 |
When to go
Helsinki is warmest in August at 17.5 °C but brightest in June, averaging 16.0 hours of sun a day — the two do not always coincide, which is worth knowing before booking. Its coldest is January at -4.4 °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.
How busy it gets
Helsinki-Uusimaa records 4.1 overnight stays per resident a year (7,319,289 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 Helsinki
Places to stay in Helsinki, Finland, on a live map. Prices and availability come from Stay22 and its booking partners.
Search places to stay in Helsinki →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.