December is Iceland at its darkest and most festive. Around the solstice, Reykjavík gets about four hours of daylight. The rest is twilight, town lights, and — if the sky clears — aurora. The month splits in two: the first three weeks are quiet and cheap, the last ten days are the busiest of winter. Both versions work. Here is how to plan for each.
December is the darkest month of the year in Iceland. Around the winter solstice on December 21, the sun in Reykjavík rises about 11:20 and sets about 15:30. That is roughly four hours of direct daylight, stretched by long twilight on either side. Early December gives you closer to five hours. It is dark, but it is not black: the sun never climbs far above the horizon, so the light stays low and golden for the whole short day.
Temperatures are milder than the latitude suggests. Reykjavík averages between −2°C and +3°C in December. The coast hovers around freezing. The north and the interior run colder. The real variable is wind. A calm, clear December day feels gentle. A storm day closes roads and cancels tours.
The month splits cleanly in two. December 1–20 is low season: flights and hotels sit near their yearly lows, tours run with empty seats, and the Christmas lights are already up. December 21–31 is the opposite. Christmas and New Year's draw the biggest crowds of the winter, prices peak, and good hotels and holiday restaurant tables sell out weeks ahead. If you want December cheap, come early. If you want the fireworks, book early.
Four usable hours of light sounds unworkable. In practice the day has a clear rhythm: sights in the 10:30–15:30 window, everything else in the dark. Here is a realistic Golden Circle day near the solstice.
| Time | Plan | Light |
|---|---|---|
| 08:00 | Breakfast, load the car | Full dark |
| 09:00 | Drive toward Þingvellir | Dark, quiet roads |
| 10:30 | Walk the rift valley | Blue twilight |
| 11:20 | Sunrise | Low golden light |
| 12:30 | Geysir, eruptions every few minutes | Full daylight |
| 13:30 | Gullfoss waterfall | Sun already sinking |
| 15:30 | Sunset, start the drive back | Long twilight |
| 17:00 | Hot pool or lagoon | Dark |
| 19:30 | Dinner in Reykjavík | Dark |
| 22:00 | Aurora check if the sky is clear | Dark, the useful kind |
The trick is to treat darkness as part of the plan, not a loss. Drives, breakfasts, pools, and dinners all happen comfortably in the dark. You only need daylight for the sights themselves, and twilight adds close to an hour on each end.
Iceland takes Christmas seriously. There is no single Santa; there are thirteen. The Yule Lads come down from the mountains one per night starting December 12, and children leave a shoe on the windowsill each evening. Good behavior earns a small treat. Bad behavior earns a rotten potato. Each Lad has a specific habit — Spoon-Licker, Door-Slammer, Sausage-Swiper — and museums and towns run Yule Lad events through the month.
Then the country goes home. December 24, 25, and 26 are family days, and most of Iceland closes.
New Year's Eve is the payoff. Reykjavík has no official fireworks display. Instead, residents buy their own — sales fund the volunteer search-and-rescue teams — and the whole city fires them at midnight. Neighborhood bonfires burn from early evening. It is loud, unscripted, and worth planning a trip around.
The tour calendar does not stop for the dark. Golden Circle and South Coast day tours run daily all month; operators fit the sights into the light window and drive the dark ends. Ice cave tours are in full swing. The blue glacier caves under Vatnajökull are only stable in the cold months, and December sits in the heart of that season, so this is one of the best months of the year to see one.
The northern lights need darkness, and December supplies about twenty hours of it. Any clear night is a chance, from a city street or a tour bus. Check the aurora forecast before you pay for a tour: cloud cover decides more than solar activity does. Pools and geothermal lagoons stay open through the holidays and are at their best in the cold — steam, snow, black sky.
December driving is real winter driving. Expect snow, ice, and wind on any day, anywhere in the country. Rent a 4x4 on studded winter tires — they are standard on winter rentals — and keep daily distances short. The Ring Road stays open most of the time, but sections close during storms, and one bad weather system can cost you a full day. Build at least one spare day into any itinerary that leaves the capital.
Check conditions every morning, not once per trip. Our live road conditions page shows current closures, and the winter driving guide covers the rest: reading the wind forecast, driving on ice, and knowing when not to drive at all. If you would rather skip all of it, base yourself in Reykjavík and take day tours. In December that is a sensible plan, not a compromise.
A short verdict by traveler type.
Yes, with the right expectations. You get ice caves, aurora-length nights, Christmas lights, and low early-month prices. You give up daylight and weather reliability. It is a good month for a Reykjavík-based trip with day tours, and a poor month for a full Ring Road circle.
About four to five hours. Around the solstice on December 21, Reykjavík sees sunrise near 11:20 and sunset near 15:30 — just over four hours. Early December is closer to five. Twilight adds usable light on both ends.
Yes. December has the longest nights of the year, so any clear, dark sky is a chance. Cloud cover is the main obstacle, not darkness. Plan several nights and check the forecast each evening.
Close to it. December 24–26 are public holidays: shops close by early afternoon on the 24th and most businesses stay closed through the 26th. A handful of restaurants open with set holiday menus that book out early. Buy groceries by the 23rd.
Yes on calm days, no in storms. Roads are plowed and rentals come on studded tires, but wind and ice are constant risks and closures are routine. Check the road conditions and weather every morning, keep distances short, and be willing to cancel a driving day.