Reykjavik in December: What to Expect

December is peak Northern Lights season in Reykjavik, and that fact dominates the decision to visit. With fewer than five hours of daylight around the solstice and long, dark nights that stretch from mid-afternoon to mid-morning, the conditions for aurora hunting are as good as Iceland offers. The city is also genuinely festive and small enough to feel cosy rather than overwhelming in winter. The honest caveats: it's expensive, it's cold, it's dark, and the Northern Lights require clear skies that December doesn't always provide.

Weather

Subzero and dark. December in Reykjavik averages -1°C to 3°C, with wind, frequent cloud, and occasional snow. The days are extremely short: around 4 to 5 hours of usable daylight at the solstice. This is not a mild weather city break. It's a proper winter expedition. Dress for Arctic conditions: thermal base layers, insulated waterproof jacket, waterproof trousers for outdoor excursions, hat, gloves, and boots rated for snow and ice.

Crowds and Prices

Iceland is expensive across all price points. December is peak season for Northern Lights tourism, and accommodation prices and tour costs reflect that. The city is busy but manageable given how small Reykjavik is. Northern Lights tours book out quickly for clear-sky-forecast nights. New Year's Eve in Reykjavik is one of Iceland's biggest events: the Icelandic tradition of massive public bonfires on NYE and midnight fireworks that seem to come from every direction simultaneously is genuinely extraordinary.

What's On

The Northern Lights are the main event. December's long nights give the maximum window for aurora sightings, and Iceland's aurora activity, driven by its high latitude, peaks in winter. Clear skies are the variable that cannot be guaranteed: December cloud cover is a real risk. Check forecasts nightly, book a flexible tour that operates only on clear nights, and if you get one clear evening, get out of the city lights. The Golden Circle day trip (Thingvellir, Geysir, Gullfoss) is spectacular in snow conditions. Reykjavik's Christmas market at Hafnarhúsið is modest but charming. New Year's Eve bonfire and fireworks tradition is unique to Iceland and genuinely memorable.

One Thing to Watch

Northern Lights are not guaranteed in December or any other month. Cloud cover can obscure the aurora for entire weeks. If seeing the Northern Lights is the sole purpose of the trip, build in at least four to five nights to improve the odds, and book accommodation with a flexible cancellation policy in case conditions are consistently poor.