Lisbon · May · sunshine

Sunniest places to go from Lisbon in May

The sunniest place you can reach from Lisbon in May within 15 hours is Örnsköldsvik at 15.1 h, costing 830 kg CO₂e return. The lowest-carbon option is Figueira da Foz Municipality at 4.7 kg — 177× less carbon for 3.2 h less.

Every destination here is on the efficiency frontier: nowhere else in Europe is both sunnier in May and lower in carbon. Anything a better option beats outright has been left out.

Where they are. Solid lines are rail or ferry, dashed are flights, from Lisbon. Pick one to compare.

By rail or ferry By air

Carbon against sunshine, May, departing Lisbon. Journeys of up to 15 hours each way.

May from Lisbon — 6 destinations on the frontier, 3 without flying.
Destination	How	CO₂e return	Temp	Sun/day	Rain/day	Journey
Figueira da Foz Municipality, Portugal	Rail	4.7 kg	16.7 °C	11.9 h	1.2 mm	4h 12m
Portimão, Portugal	Rail	5.4 kg	19.3 °C	12.6 h	0.7 mm	4h 30m
Zaragoza, Spain	Rail	22.8 kg	18.8 °C	13.1 h	0.8 mm	12h 36m
Allerød Municipality, Denmark	Air	624 kg	13.3 °C	13.8 h	0.7 mm	6h 48m
Gävle, Sweden	Air	766 kg	12.6 °C	14.7 h	0.7 mm	7h 36m
Örnsköldsvik, Sweden	Air	830 kg	9.0 °C	15.1 h	0.5 mm	7h 54m

Warm is not the same as pleasant, which is why sunshine and rainfall are shown alongside temperature. All three are ERA5 monthly means for 2023–2024.

Where the curve breaks

The frontier is gentle until it isn't. Going from Zaragoza (22.8 kg, 13.1 h) to Allerød Municipality (624 kg, 13.8 h) buys 0.7 hours more sunshine for an extra 601 kg — 859 kg of CO₂e per hour. That single step is the most expensive sunshine on the whole curve.

The pick of them

Figueira da Foz MunicipalityPortugal4.7 kg CO₂e return16.7 °C · 11.9 h sun · 4h 12m by railwarm overall ZaragozaSpain22.8 kg CO₂e return18.8 °C · 13.1 h sun · 12h 36m by railwarm, bright and dry ÖrnsköldsvikSweden830 kg CO₂e return9.0 °C · 15.1 h sun · 7h 54m by aircold but bright

If you'd rather have heat than sunshine

May answers differently depending on what you're after. The warmest destinations from Lisbon in May are a different list — hours of sunshine and degrees of warmth come apart, especially early and late in the year.

Where to stay in Örnsköldsvik

Places to stay in Örnsköldsvik, Sweden, 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.

Other months from Lisbon

May from elsewhere

Questions

Where is the sunniest place to go from Lisbon in May?

Örnsköldsvik, Sweden, at 15.1 h. Reaching it emits 830 kg CO₂e return, travelling 7h 54m each way by air.

Can I get somewhere sunny from Lisbon in May without flying?

Yes. Zaragoza reaches 13.1 h and is reachable by rail or ferry in 12h 36m, emitting 22.8 kg CO₂e return — though Örnsköldsvik is sunnier still, if you fly.

How much carbon does a return trip from Lisbon to Örnsköldsvik produce?

830 kg CO₂e for one person, return, by air. That uses the UK Government's 2026 conversion factors, including radiative forcing for flights.

Carbon uses UK Government (DESNZ/DEFRA) 2026 conversion factors applied to great-circle distance, with radiative forcing included for flights. Rail journey times are modelled estimates, not timetabled services. Full method · download the data.