Zurich · May · relief from the heat

Coolest places to go from Zurich in May

In May, the coolest well-known place within 15 hours of Zurich is Tromsø, Norway, 7.7 °C cooler than Zurich and 7.0 h sun a day, about 6h 54m each way by air. Without flying, it is Buxton, United Kingdom, 2.5 °C cooler than Zurich, about 14h 6m each way by train, for about 15× less carbon (41.4 kg CO₂e return against 639 kg).

The 10 coolest places within 15 hours of Zurich

Ranked on relief from the heat in May alone, among well-known places (a Wikivoyage travel guide and at least 40,000 Wikipedia readers a year), one per area and at most three per country. The carbon is shown, not used to choose: the list further down is the other question, how much relief from the heat each extra kilogram buys.

Tromsø, Norway7.7 °C cooler · 7.0 h sun a day · 4.9 mm rain a dayair ≈ 6h 54m · 639 kg CO₂e return
Reykjavik, Iceland7.0 °C cooler · 6.4 h sun a day · 5.9 mm rain a day · sea 7.5 °Cair ≈ 7h · 659 kg CO₂e return
Rovaniemi, Finland5.8 °C cooler · 13.4 h sun a day · mostly dryair ≈ 6h 36m · 591 kg CO₂e return
Luleå, Sweden5.7 °C cooler · 14.8 h sun a day · mostly dry · sea 1.5 °Cair ≈ 6h 24m · 548 kg CO₂e return
Bodø, Norway5.3 °C cooler · 9.4 h sun a day · 4.4 mm rain a day · sea 6.4 °Cair ≈ 6h 30m · 563 kg CO₂e return
Oulu, Finland5.3 °C cooler · 14.4 h sun a day · mostly dry · sea 2.2 °Cair ≈ 6h 24m · 555 kg CO₂e return
Umeå, Sweden4.6 °C cooler · 15.0 h sun a day · mostly dry · sea 3.8 °Cair ≈ 6h 6m · 494 kg CO₂e return
Erzurum, Turkey4.1 °C cooler · 10.8 h sun a day · 4.7 mm rain a dayair ≈ 7h 12m · 689 kg CO₂e return
Kars, Turkey4.1 °C cooler · 10.5 h sun a day · 4.1 mm rain a dayair ≈ 7h 18m · 714 kg CO₂e return
Vaasa, Finland3.8 °C cooler · 14.8 h sun a day · mostly dry · sea 5.2 °Cair ≈ 6h 6m · 485 kg CO₂e return

Without flying

The coolest places the train reaches within 15 hours. Buxton is 2.5 °C cooler for 41.4 kg — about 15× less carbon than flying to Tromsø.

Buxton, United Kingdom2.5 °C cooler · 10.4 h sun a day · 2.8 mm rain a dayrail ≈ 14h 6m · 41.4 kg CO₂e return
Zakopane, Poland2.2 °C cooler · 11.1 h sun a day · 3.9 mm rain a dayrail ≈ 14h 36m · 25.6 kg CO₂e return
Scarborough, United Kingdom2.1 °C cooler · 10.9 h sun a day · 1.9 mm rain a day · sea 9.8 °Crail ≈ 14h 36m · 47.8 kg CO₂e return

≈ is the model's estimate (air times include getting to and through the airport); ✓ is a rail journey checked against a real timetable, with the date it was checked. Temperatures are historical daily means for 2023–2024, averaged across day and night, so afternoons run warmer.

The low-carbon trade-off

The coolest place you can reach from Zurich in May within 15 hours is Tromsø, 7.7 °C cooler, costing 639 kg CO₂e return. The lowest-carbon option is Pontarlier at 5.1 kg — 125× less carbon, for 5.5 degrees less relief from the heat.

Every destination here is on the efficiency frontier: nowhere else this site covers is both cooler 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 Zurich. Pick one to compare.

By rail or ferry By air

Carbon against relief from the heat, May, departing Zurich. Journeys of up to 15 hours each way.

May from Zurich — 5 destinations on the frontier, 1 without flying.
Destination	How	CO₂e return	Temp	Sun/day	Rain/day	Journey
Pontarlier, France	Rail	5.1 kg	11.4 °C	9.7 h	5.1 mm	4h 30m
Östersund, Sweden	Air	452 kg	9.9 °C	14.2 h	0.7 mm	5h 54m
Umeå, Sweden	Air	494 kg	9.0 °C	15.0 h	0.6 mm	6h 6m
Tornio, Finland	Air	566 kg	7.1 °C	14.6 h	0.7 mm	6h 30m
Tromsø, Norway	Air	639 kg	5.9 °C	7.0 h	4.9 mm	6h 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 Pontarlier (5.1 kg, 2.2 °C cooler) to Östersund (452 kg, 3.7 °C cooler) buys 1.5 °C more relief from the heat for an extra 447 kg — 298 kg of CO₂e per degree. That single step is the most expensive relief from the heat on the whole curve.

The pick of them

PontarlierFrance5.1 kg CO₂e return11.4 °C · 9.7 h sun · 4h 30m by railmild and bright

TromsøNorway639 kg CO₂e return5.9 °C · 7.0 h sun · 6h 54m by aircold but bright

The same month, asked differently

May answers differently depending on what you are after, and the lists genuinely diverge: the brightest places are not the hottest, and in summer the useful question stops being where is warm at all.

Where to stay in Tromsø

Places to stay in Tromsø, Norway, on a live map. Prices and availability come from Stay22 and its booking partners.

Search places to stay in Tromsø →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.

Other months from Zurich

May from elsewhere

Photo credits

Pontarlier: Henk Monster, CC BY-SA 3.0, via Wikimedia Commons
Tromsø: Diego Delso, CC BY-SA 4.0, via Wikimedia Commons
Reykjavik: Hedwig Storch, CC BY-SA 3.0, via Wikimedia Commons
Luleå: Andreas Harnemo, CC BY-SA 3.0, via Wikimedia Commons
Bodø: Røed 20:41, 24 July 2006 (UTC), CC BY-SA 2.5, via Wikimedia Commons
Umeå: Jonipoon, CC BY-SA 4.0, via Wikimedia Commons
Kars: Bjørn Christian Tørrissen, CC BY-SA 3.0, via Wikimedia Commons
Buxton: Andrew Hill, CC BY-SA 2.0, via Wikimedia Commons
Zakopane: Maksym Kozlenko, CC BY-SA 4.0, via Wikimedia Commons
Scarborough: Thomas Tolkien, CC BY 2.0, via Wikimedia Commons

Questions

Where is the coolest place to go from Zurich in May?

Tromsø, Norway, at 7.7 °C cooler. Reaching it emits 639 kg CO₂e return, travelling 6h 54m each way by air (modelled).

Can I get somewhere cool from Zurich in May without flying?

Yes. Pontarlier reaches 2.2 °C cooler and is reachable by rail or ferry in 4h 30m (modelled), emitting 5.1 kg CO₂e return — though Tromsø is cooler still, if you fly.

How much carbon does a return trip from Zurich to Tromsø produce?

639 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.