Sheffield · May · relief from the heat

Coolest places to go from Sheffield in May

In May, the coolest well-known place within 15 hours of Sheffield is Tromsø, Norway, 7.0 °C cooler than Sheffield and 7.0 h sun a day, about 6h 18m each way by air. Without flying, it is Aberdeen, United Kingdom, 2.2 °C cooler than Sheffield, about 7h 36m each way by train, for about 16× less carbon (33.8 kg CO₂e return against 524 kg).

The 10 coolest places within 15 hours of Sheffield

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, Norway7.0 °C cooler · 7.0 h sun a day · 4.9 mm rain a dayair ≈ 6h 18m · 524 kg CO₂e return
Reykjavik, Iceland6.3 °C cooler · 6.4 h sun a day · 5.9 mm rain a day · sea 7.5 °Cair ≈ 5h 42m · 419 kg CO₂e return
Rovaniemi, Finland5.1 °C cooler · 13.4 h sun a day · mostly dryair ≈ 6h 18m · 521 kg CO₂e return
Luleå, Sweden5.0 °C cooler · 14.8 h sun a day · mostly dry · sea 1.5 °Cair ≈ 6h · 473 kg CO₂e return
Bodø, Norway4.6 °C cooler · 9.4 h sun a day · 4.4 mm rain a day · sea 6.4 °Cair ≈ 5h 54m · 443 kg CO₂e return
Oulu, Finland4.6 °C cooler · 14.4 h sun a day · mostly dry · sea 2.2 °Cair ≈ 6h 6m · 498 kg CO₂e return
Umeå, Sweden3.9 °C cooler · 15.0 h sun a day · mostly dry · sea 3.8 °Cair ≈ 5h 48m · 427 kg CO₂e return
Erzurum, Turkey3.4 °C cooler · 10.8 h sun a day · 4.7 mm rain a dayair ≈ 8h 12m · 886 kg CO₂e return
Kars, Turkey3.4 °C cooler · 10.5 h sun a day · 4.1 mm rain a dayair ≈ 8h 18m · 904 kg CO₂e return
Vaasa, Finland3.1 °C cooler · 14.8 h sun a day · mostly dry · sea 5.2 °Cair ≈ 5h 48m · 431 kg CO₂e return

Without flying

The coolest places the train reaches within 15 hours. Aberdeen is 2.2 °C cooler for 33.8 kg — about 16× less carbon than flying to Tromsø.

Aberdeen, United Kingdom2.2 °C cooler · 9.5 h sun a day · 2.2 mm rain a day · sea 9.0 °Crail ≈ 7h 36m · 33.8 kg CO₂e return
La Chaux-de-Fonds, Switzerland2.1 °C cooler · 9.6 h sun a day · 4.8 mm rain a dayrail ≈ 13h 54m · 39.0 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 Sheffield in May within 15 hours is Reykjavik, 6.3 °C cooler, costing 419 kg CO₂e return. The lowest-carbon option is Aberdeen at 33.8 kg — 12× less carbon, for 4.1 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 Sheffield. Pick one to compare.

By rail or ferry By air

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

May from Sheffield — 4 destinations on the frontier, 1 without flying.
Destination	How	CO₂e return	Temp	Sun/day	Rain/day	Journey
Aberdeen, United Kingdom	Rail	33.8 kg	10.7 °C	9.5 h	2.2 mm	7h 36m
Östersund, Sweden	Air	360 kg	9.9 °C	14.2 h	0.7 mm	5h 24m
Örnsköldsvik, Sweden	Air	403 kg	9.0 °C	15.1 h	0.5 mm	5h 36m
Reykjavik, Iceland	Air	419 kg	6.6 °C	6.4 h	5.9 mm	5h 42m

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 Aberdeen (33.8 kg, 2.2 °C cooler) to Östersund (360 kg, 3.0 °C cooler) buys 0.8 °C more relief from the heat for an extra 326 kg — 408 kg of CO₂e per degree. That single step is the most expensive relief from the heat on the whole curve.

The pick of them

AberdeenUnited Kingdom33.8 kg CO₂e return10.7 °C · 9.5 h sun · 7h 36m by railmild and bright

ReykjavikIceland419 kg CO₂e return6.6 °C · 6.4 h sun · 5h 42m by aircool

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 Reykjavik

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

Search places to stay in Reykjavik →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 Sheffield

May from elsewhere

Photo credits

Aberdeen: Ragazzi00, CC BY-SA 3.0, via Wikimedia Commons
Reykjavik: Hedwig Storch, CC BY-SA 3.0, via Wikimedia Commons
Tromsø: Diego Delso, CC BY-SA 4.0, 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

Questions

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

Reykjavik, Iceland, at 6.3 °C cooler. Reaching it emits 419 kg CO₂e return, travelling 5h 42m each way by air (modelled).

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

Yes. Aberdeen reaches 2.2 °C cooler and is reachable by rail or ferry in 7h 36m (modelled), emitting 33.8 kg CO₂e return — though Reykjavik is cooler still, if you fly.

How much carbon does a return trip from Sheffield to Reykjavik produce?

419 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.