0xCarbon
France · 48.65°, -2.01° · 10 m

St-Malo

Reaching St-Malo from London emits 10.2 kg CO₂e return by rail (8h 48m each way) against 86.9 kg by air — 9× the carbon. It averages 18.5 °C in August and 7.4 °C in January.

When to go: St-Malo is warmest in August (18.5 °C), sunniest in June (12.8 h a day); coldest in January (7.4 °C). Month by month

10.2kg CO₂e return by rail, from London
86.9kg CO₂e return by air, from London
12.8hours of sunshine a day in June, its brightest month

Getting there

Return carbon and one-way journey time to St-Malo. Times are modelled.
FromDistanceBy railRail timeBy airAir time
Amsterdam640 km18.9 kg9h 12m161 kg4h 24m
Barcelona871 km25.7 kg12h 30m219 kg4h 42m
Berlin1,168 km34.5 kg14h 30m294 kg5h 6m
Birmingham426 km23.3 kg11h 30m107 kg4h 6m
Bristol315 km23.9 kg11h 48m79.2 kg3h 54m
Brussels518 km15.3 kg7h 18m130 kg4h 12m
Cardiff326 km27.2 kg12h 6m82.0 kg3h 54m
Copenhagen1,260 km37.2 kg20h317 kg5h 12m
Dublin599 km——151 kg4h 18m
Edinburgh816 km53.1 kg14h 30m205 kg4h 36m
Frankfurt790 km23.3 kg9h 30m199 kg4h 36m
Glasgow817 km54.8 kg14h 42m206 kg4h 36m
Leeds573 km32.0 kg12h 24m144 kg4h 18m
Lisbon1,242 km36.7 kg19h 42m313 kg5h 12m
Liverpool534 km33.2 kg12h 24m134 kg4h 12m
London345 km10.2 kg8h 48m86.9 kg4h
Madrid925 km27.3 kg15h 12m233 kg4h 42m
Manchester538 km31.2 kg12h 18m135 kg4h 12m
Milan918 km27.1 kg12h 54m231 kg4h 42m
Munich1,003 km29.6 kg11h 36m252 kg4h 48m
Newcastle704 km42.2 kg13h177 kg4h 24m
Nottingham483 km24.3 kg11h 54m121 kg4h 6m
Oslo1,496 km44.1 kg23h 36m376 kg5h 30m
Paris320 km9.5 kg4h 30m80.6 kg3h 54m
Prague1,198 km35.4 kg18h 24m301 kg5h 6m
Rome1,359 km40.1 kg16h 54m342 kg5h 18m
Sheffield528 km28.5 kg12h 12m133 kg4h 12m
Southampton255 km19.1 kg11h 30m64.0 kg3h 48m
Stockholm1,758 km51.9 kg25h 24m442 kg5h 48m
Vienna1,354 km40.0 kg16h 42m341 kg5h 18m
Warsaw1,671 km49.3 kg22h420 kg5h 42m
Zurich798 km23.5 kg9h 54m201 kg4h 36m

The year in St-Malo

Average temperature, °C — warmest in August
January: 7.4 °C7.4 °CJanFebruary: 8.6 °CFebMarch: 9.5 °CMarApril: 10.8 °CAprMay: 13.7 °CMayJune: 16.6 °CJunJuly: 17.6 °CJulAugust: 18.5 °C18.5 °CAugSeptember: 17.6 °CSepOctober: 15.0 °COctNovember: 11.5 °CNovDecember: 9.5 °CDec
Sunshine, hours a day — brightest in June
January: 4.7 hJanFebruary: 4.9 hFebMarch: 6.9 hMarApril: 9.0 hAprMay: 11.8 hMayJune: 12.8 h12.8 hJunJuly: 10.2 hJulAugust: 10.3 hAugSeptember: 8.9 hSepOctober: 7.1 hOctNovember: 4.1 hNovDecember: 3.8 h3.8 hDec
Sea temperature, °C — warmest in August
January: 10.4 °CJanFebruary: 9.5 °C9.5 °CFebMarch: 9.6 °CMarApril: 11.1 °CAprMay: 13.1 °CMayJune: 15.9 °CJunJuly: 17.6 °CJulAugust: 18.8 °C18.8 °CAugSeptember: 18.6 °CSepOctober: 17.0 °COctNovember: 14.5 °CNovDecember: 11.6 °CDec
Historical daily means for 2023–2024, by month (ERA5 reanalysis) — averaged across day and night; sea temperature NOAA OISST v2.1, 2023–2024, nearest open sea
 JanFebMarAprMayJunJulAugSepOctNovDec
Temp °C7.48.69.510.813.716.617.618.517.615.011.59.5
Sun h/day4.74.96.99.011.812.810.210.38.97.14.13.8
Rain mm/day2.72.02.92.21.71.33.22.73.03.04.42.8
Sea °C10.49.59.611.113.115.917.618.818.617.014.511.6

When to go

St-Malo is warmest in August at 18.5 °C but brightest in June, averaging 12.8 hours of sun a day — the two do not always coincide, which is worth knowing before booking. Its coldest is January at 7.4 °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.

Staying there

A hotel room in France emits about 6.7 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 47 kg — about 4.9× the carbon of one person getting there by rail from Paris. Two sharing the room halve that share each; the journey does not halve.

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 St-Malo

Places to stay in St-Malo, France, on a live map. Prices and availability come from Stay22 and its booking partners.

Search places to stay in St-Malo →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.