Copenhagen · June · relief from the heat

Coolest places to go from Copenhagen in June

In June, the coolest well-known place within 15 hours of Copenhagen is Reykjavik, Iceland, 7.3 °C cooler than Copenhagen and 7.9 h sun a day, about 6h 18m each way by air. Without flying, it is Bergen, Norway, 3.0 °C cooler than Copenhagen, about 11h 48m each way by train, for about 27× less carbon (19.9 kg CO₂e return against 529 kg).

The 10 coolest places within 15 hours of Copenhagen

Ranked on relief from the heat in June 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.

Reykjavik, Iceland7.3 °C cooler · 7.9 h sun a day · 4.4 mm rain a day · sea 9.1 °Cair ≈ 6h 18m · 529 kg CO₂e return
Tromsø, Norway3.9 °C cooler · 11.8 h sun a day · 3.0 mm rain a dayair ≈ 5h 36m · 399 kg CO₂e return
Bodø, Norway3.6 °C cooler · 11.1 h sun a day · 4.8 mm rain a day · sea 10.2 °Cair ≈ 5h 12m · 326 kg CO₂e return
Buxton, United Kingdom3.3 °C cooler · 11.6 h sun a day · 2.2 mm rain a dayair ≈ 4h 48m · 244 kg CO₂e return
Aberdeen, United Kingdom3.1 °C cooler · 12.5 h sun a day · 2.2 mm rain a day · sea 11.3 °Cair ≈ 4h 42m · 230 kg CO₂e return
Dundee, United Kingdom3.0 °C cooler · 11.4 h sun a day · 1.9 mm rain a day · sea 12.5 °Cair ≈ 4h 48m · 243 kg CO₂e return
Bergen, Norway3.0 °C cooler · 11.9 h sun a day · 4.4 mm rain a day · sea 12.0 °Crail ≈ 11h 48m · 19.9 kg CO₂e return
Östersund, Sweden2.4 °C cooler · 13.8 h sun a day · 3.0 mm rain a dayrail ≈ 14h 6m · 24.9 kg CO₂e return
Douglas, Isle of Man2.3 °C cooler · 12.5 h sun a day · 2.2 mm rain a day · sea 13.0 °Cair ≈ 5h · 277 kg CO₂e return
Sligo, Ireland2.1 °C cooler · 10.4 h sun a day · 4.0 mm rain a day · sea 14.9 °Cair ≈ 5h 18m · 339 kg CO₂e return

Without flying

The coolest places the train reaches within 15 hours. Bergen is 3.0 °C cooler for 19.9 kg — about 27× less carbon than flying to Reykjavik.

Bergen, Norway3.0 °C cooler · 11.9 h sun a day · 4.4 mm rain a day · sea 12.0 °Crail ≈ 11h 48m · 19.9 kg CO₂e return
Ålesund, Norway3.0 °C cooler · 11.4 h sun a day · 3.2 mm rain a day · sea 11.3 °Crail ≈ 14h 6m · 24.8 kg CO₂e return
Haugesund, Norway2.8 °C cooler · 13.5 h sun a day · 4.9 mm rain a day · sea 12.2 °Crail ≈ 10h 42m · 17.7 kg CO₂e return
Trondheim, Norway2.6 °C cooler · 11.3 h sun a day · 3.2 mm rain a dayrail ≈ 14h 36m · 25.7 kg CO₂e return
Östersund, Sweden2.4 °C cooler · 13.8 h sun a day · 3.0 mm rain a dayrail ≈ 14h 6m · 24.9 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 Copenhagen in June within 15 hours is Reykjavik, 7.3 °C cooler, costing 529 kg CO₂e return. The lowest-carbon option is Stavanger at 16.2 kg — 33× less carbon, for 4.8 degrees less relief from the heat.

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

By rail or ferry By air

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

What the 15-hour limit costs: at this budget Harstad can only be reached by air — 371 kg CO₂e, in 5h 30m. Allow up to 24 hours and the train does the same journey for 43.5 kg in 23h 6m — 9× less carbon for 17h 36m more travelling.

June from Copenhagen — 4 destinations on the frontier, 2 without flying.
Destination	How	CO₂e return	Temp	Sun/day	Rain/day	Journey
Stavanger, Norway	Rail	16.2 kg	13.7 °C	13.7 h	4.1 mm	9h 54m
Kristiansund, Norway	Rail	25.7 kg	12.6 °C	11.3 h	3.6 mm	14h 36m
Harstad, Norway	Air	371 kg	11.6 °C	11.9 h	2.1 mm	5h 30m
Reykjavik, Iceland	Air	529 kg	8.9 °C	7.9 h	4.4 mm	6h 18m

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 Kristiansund (25.7 kg, 3.6 °C cooler) to Harstad (371 kg, 4.6 °C cooler) buys 1.0 °C more relief from the heat for an extra 345 kg — 345 kg of CO₂e per degree. That single step is the most expensive relief from the heat on the whole curve.

The pick of them

StavangerNorway16.2 kg CO₂e return13.7 °C · 13.7 h sun · 9h 54m by railmild and bright

KristiansundNorway25.7 kg CO₂e return12.6 °C · 11.3 h sun · 14h 36m by railmild and bright

ReykjavikIceland529 kg CO₂e return8.9 °C · 7.9 h sun · 6h 18m by aircold but bright

The same month, asked differently

June 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 Copenhagen

June from elsewhere

Photo credits

Stavanger: Original by en:User:Godztian, CC BY-SA 3.0, via Wikimedia Commons
Kristiansund: Harald Oppedal, CC BY 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
Bodø: Røed 20:41, 24 July 2006 (UTC), CC BY-SA 2.5, via Wikimedia Commons
Buxton: Andrew Hill, CC BY-SA 2.0, via Wikimedia Commons
Aberdeen: Ragazzi00, CC BY-SA 3.0, via Wikimedia Commons
Dundee: File:442 dundee header.png (Tay Bridge and RSS Discovery images):- Original: PlutosAcademy File:V&A Dundee Near Completi, CC BY-SA 4.0, via Wikimedia Commons
Bergen: W. Bulach, CC BY-SA 4.0, via Wikimedia Commons
Östersund: Lars Falkdalen Lindahl (User:Njaelkies Lea), CC BY-SA 3.0, via Wikimedia Commons
Douglas: Jim Linwood, CC BY 2.0, via Wikimedia Commons
Sligo: Gerd Eichmann, CC BY-SA 4.0, via Wikimedia Commons
Ålesund: Holger Uwe Schmitt, CC BY-SA 4.0, via Wikimedia Commons
Haugesund: Efarestv, CC BY-SA 3.0, via Wikimedia Commons
Trondheim: Åge Hojem/Trondheim Havn from Trondheim, Norway, CC BY-SA 2.0, via Wikimedia Commons

Questions

Where is the coolest place to go from Copenhagen in June?

Reykjavik, Iceland, at 7.3 °C cooler. Reaching it emits 529 kg CO₂e return, travelling 6h 18m each way by air (modelled).

Can I get somewhere cool from Copenhagen in June without flying?

Yes. Kristiansund reaches 3.6 °C cooler and is reachable by rail or ferry in 14h 36m (modelled), emitting 25.7 kg CO₂e return — though Reykjavik is cooler still, if you fly.

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

529 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.