Warsaw · January · relief from the heat

Coolest places to go from Warsaw in January

The coolest place you can reach from Warsaw in January within 15 hours is Joensuu, 9.3 °C cooler, costing 318 kg CO₂e return. The lowest-carbon option is Bialystok at 5.2 kg — 61× less carbon, for 7.3 degrees less relief from the heat.

The 10 coolest places within 15 hours of Warsaw

Ranked on relief from the heat in January 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.

Rovaniemi, Finland10.0 °C cooler · 0.7 h sun a dayair 5h 36m · 404 kg CO₂e return
Joensuu, Finland9.3 °C cooler · 1.2 h sun a dayair 5h 12m · 318 kg CO₂e return
Luleå, Sweden9.0 °C cooler · 1.5 h sun a dayair 5h 30m · 374 kg CO₂e return
Oulu, Finland8.8 °C cooler · 1.2 h sun a dayair 5h 24m · 363 kg CO₂e return
Umeå, Sweden7.3 °C cooler · 1.7 h sun a dayair 5h 12m · 325 kg CO₂e return
Östersund, Sweden7.2 °C cooler · 1.3 h sun a dayair 5h 12m · 320 kg CO₂e return
Narva, Estonia6.6 °C cooler · 1.3 h sun a dayair 4h 42m · 229 kg CO₂e return
Tromsø, Norway6.3 °C cooler · 0.0 h sun a dayair 6h 6m · 488 kg CO₂e return
Oslo, Norway6.2 °C cooler · 2.5 h sun a dayair 4h 54m · 267 kg CO₂e return
Tartu, Estonia5.8 °C cooler · 1.1 h sun a dayair 4h 30m · 194 kg CO₂e return

Without flying

The coolest places the train reaches within 15 hours. Daugavpils is 4.7 °C cooler for 16.0 kg — about 25× less carbon than flying to Rovaniemi.

Daugavpils, Latvia4.7 °C cooler · 1.3 h sun a dayrail 14h 48m · 16.0 kg CO₂e return
Västerås, Sweden3.8 °C cooler · 2.2 h sun a dayrail 14h 12m · 25.6 kg CO₂e return
Karlstad, Sweden3.8 °C cooler · 2.3 h sun a dayrail 14h 48m · 27.2 kg CO₂e return
Vilnius, Lithuania3.8 °C cooler · 1.5 h sun a dayrail 11h 18m · 11.6 kg CO₂e return
Uppsala, Sweden3.7 °C cooler · 2.0 h sun a dayrail 14h 30m · 25.8 kg CO₂e return
Šiauliai, Lithuania3.7 °C cooler · 1.6 h sun a dayrail 12h 24m · 12.9 kg CO₂e return

Rail times are modelled; air times include getting to and through the airport.

The low-carbon trade-off

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

By rail or ferry By air

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

What the 15-hour limit costs: at this budget Rēzekne can only be reached by air — 158 kg CO₂e, in 4h 18m. Allow up to 24 hours and the train does the same journey for 18.5 kg in 16h 48m — 9× less carbon for 12h 30m more travelling.

January from Warsaw — 8 destinations on the frontier, 3 without flying.
Destination	How	CO₂e return	Temp	Sun/day	Rain/day	Journey
Bialystok, Poland	Rail	5.2 kg	-0.7 °C	2.0 h	2.2 mm	4h 6m
Vilnius, Lithuania	Rail	11.6 kg	-2.5 °C	1.5 h	2.5 mm	11h 18m
Utena, Lithuania	Rail	13.9 kg	-3.3 °C	1.5 h	2.5 mm	13h 12m
Rēzekne, Latvia	Air	158 kg	-4.4 °C	1.2 h	2.5 mm	4h 18m
Narva, Estonia	Air	229 kg	-5.3 °C	1.3 h	1.8 mm	4h 42m
Lappeenranta, Finland	Air	270 kg	-6.2 °C	1.3 h	1.8 mm	4h 54m
Mikkeli, Finland	Air	281 kg	-7.2 °C	1.4 h	1.7 mm	5h
Joensuu, Finland	Air	318 kg	-8.0 °C	1.2 h	1.9 mm	5h 12m

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 Utena (13.9 kg, 4.6 °C cooler) to Rēzekne (158 kg, 5.7 °C cooler) buys 1.1 °C more relief from the heat for an extra 144 kg — 131 kg of CO₂e per degree. That single step is the most expensive relief from the heat on the whole curve.

The pick of them

BialystokPoland5.2 kg CO₂e return-0.7 °C · 2.0 h sun · 4h 6m by railcool

UtenaLithuania13.9 kg CO₂e return-3.3 °C · 1.5 h sun · 13h 12m by railcool JoensuuFinland318 kg CO₂e return-8.0 °C · 1.2 h sun · 5h 12m by aircool

The same month, asked differently

January 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 Joensuu

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

Search places to stay in Joensuu →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 Warsaw

January from elsewhere

Photo credits

Bialystok: Emilia Ernst, CC BY-SA 4.0, via Wikimedia Commons
Utena: Kalnuerelis, CC BY-SA 4.0, via Wikimedia Commons
Luleå: Andreas Harnemo, CC BY-SA 3.0, via Wikimedia Commons
Umeå: Jonipoon, CC BY-SA 4.0, via Wikimedia Commons
Östersund: Lars Falkdalen Lindahl (User:Njaelkies Lea), CC BY-SA 3.0, via Wikimedia Commons
Tromsø: Diego Delso, CC BY-SA 4.0, via Wikimedia Commons
Oslo: Jonipoon, CC BY-SA 3.0, via Wikimedia Commons
Daugavpils: Ivo Kruusamägi, CC BY-SA 4.0, via Wikimedia Commons
Västerås: Einarspetz, CC BY-SA 4.0, via Wikimedia Commons
Karlstad: Håkan Svensson (Xauxa) (image 1), Janee (image 2 & 5), I99pema (image 3 & 4), CC BY-SA 3.0, via Wikimedia Commons
Vilnius: BigHead, CC BY-SA 4.0, via Wikimedia Commons
Šiauliai: UrteDra, CC BY-SA 4.0, via Wikimedia Commons

Questions

Where is the coolest place to go from Warsaw in January?

Joensuu, Finland, at 9.3 °C cooler. Reaching it emits 318 kg CO₂e return, travelling 5h 12m each way by air (modelled).

Can I get somewhere cool from Warsaw in January without flying?

Yes. Utena reaches 4.6 °C cooler and is reachable by rail or ferry in 13h 12m (modelled), emitting 13.9 kg CO₂e return — though Joensuu is cooler still, if you fly.

How much carbon does a return trip from Warsaw to Joensuu produce?

318 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.