Availability & travel notes

Weather through the year (northern Sweden by the sea)

• January – March: mostly −5°C to −15°C (the coast is slightly milder). Rare extremes well below −20°C; −40°C on the coast is practically irrelevant. Frequent snow/icy roads.
• April – May: transition season. April often −5°C to +8°C, May mostly +5°C to +15°C; late frosts are possible.
• June – August: 15°C to 25°C, with some days higher. The Baltic Sea stays cool.
• September – October: around +5°C to +15°C, more wind and rain; first cool nights.
• November – December: −5°C to +5°C; increasing snowfall and icy roads.

Notes for drivers in winter (roughly mid-November to end of March)

• Winter tyres required: 1 Dec–31 Mar in wintry road conditions; minimum tread depth 3 mm (cars).
• Studded tyres: generally allowed 1 Oct–15 Apr; outside that period only if wintry conditions apply.
• Coolant rated to at least −34°C, winter-grade screenwash.
• Use lights also during the day (standard in Sweden; many cars use DRL/low beam).

Northern lights (Aurora Borealis)

• Season: roughly mid-September to March/April; often best around the equinoxes (Sept/Mar).
• Conditions: clear, dark nights, low light pollution, view to the north.
• Note: no guarantee – activity varies; short-term forecasts/apps can help.