Reykjavik Weather in December
🇮🇸 Iceland
Europe › 🇮🇸 Iceland › Reykjavik
Updated: March 2026
Is December a Good Time to Visit Reykjavik?
December is a avoid time to visit Reykjavik (0/10). Rainfall dominates the picture, with 18 wet days and just 1 sunshine hours daily, conditions that demand a flexible itinerary. December suits travellers visiting for indoor culture, food, and architecture rather than outdoor activities. Pack accordingly for 18 potential rain days. January offers a similar profile at lower hotel rates if dates are flexible. Watch out for prolonged rain stretches: with 18 wet days, a fully outdoor itinerary is risky. Build in museum days and covered market visits as contingency. Planning tips: most accommodation categories have availability, and last-minute deals are common. The quieter streets and shorter queues can make this a genuinely enjoyable time to visit for the right type of traveller. Budget-conscious visitors will find the best value of the year in this period.
Reykjavik in December rewards travelers with average highs of 1°C and overnight lows around -3°C. Expect around 18 rainy days, so a compact umbrella is worth carrying. With 1 daily sunshine hours on average, conditions are cool and bracing, well suited for active days on foot.
1°C
Avg High
-3°C
Avg Low
18 days
Rain Days
1h
Sunshine
65%
Humidity
Temperature in Reykjavik in December
The narrow 4°C gap between daytime and overnight temperatures, characteristic of coastal cities with maritime moderation, means a single mid-layer works across the whole day. Humidity averages 65%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. The UV index of 1 is low, meaning sun exposure is minimal concern and sunscreen is largely optional. Wind averages 25 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 34°F average high, 27°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature in December
Monthly Precipitation (mm)
What to Wear in Reykjavik in December
Packing for Reykjavik in December means dressing for 1°C days and -3°C evenings. Layering is key: a thermal base, mid-layer fleece, and a windproof outer jacket for 1°C highs that feel colder in the wind. Evening temperatures settle at -3°C, a modest 4°C drop that a light cardigan or denim jacket covers. European cobblestones reward low-profile walking shoes over flip-flops or heels, with cushioned trainers or leather walking shoes being the practical choice. With 18 rain days expected, a compact travel umbrella is worth the bag space. A waterproof jacket is better than an umbrella if you plan full-day outdoor routes.
Local tip: Reykjavik's cobbled streets turn slippery in the rain. Waterproof walking shoes with a non-slip sole outperform fashionable footwear on wet stone, and you'll cover significantly more ground in comfort.
Events in Reykjavik in December
December has no major festivals or public holidays in Reykjavik, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
What to Pack for Reykjavik in December
Based on 1°C average highs and 18 rainy days
- Heavy winter coat (rated below -5°C)
- Thermal underlayers in merino wool or moisture-wicking synthetic
- Insulated, waterproof boots
- Wool hat, thick gloves, and a windproof scarf
- Compact folding umbrella
- Waterproof outer layer or packable rain jacket
- Quick-dry clothing that recovers fast after a shower
- Comfortable walking shoes (a second pair lets the first air out overnight)
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Reykjavik in December
- Vigorous walking tour of the UNESCO heritage districtMidday (12-2pm)The 1°C peak temperature provides ideal conditions for brisk sightseeing walks
- Cycling the riverside or park circuitAfternoon (1-4pm)Cool dry air makes long cycling sessions comfortable without overheating
- Explore hilltop viewpoints and fortressesMorning for clear viewsCold-weather atmospheric clarity gives the longest sightlines of the year
- Open-air Christmas or seasonal marketsAfternoon into eveningCool temperatures make festive outdoor markets genuinely atmospheric
- Spend a morning in the national or city art museumOpens at 10am; arrive earlyWith 18 rain days expected, having a full-day indoor plan is practical insurance
- Cooking class focused on regional cuisineHalf-day sessions run 10am-1pm or 3-6pmIndoor activity that fills a rainy half-day with genuine cultural content
- Visit covered historical sites: cathedral, palace, or bazaarAny time; most crowded middayRoofed monuments and covered markets provide exploration without weather exposure
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningDecember brings distinct seasonal changes to public green spaces worth exploring
- Warm up with traditional hot dishes: local stew, fondue, or braised specialities at a neighbourhood restaurantLunch (12-2pm) or dinner (7-9pm)Cold-weather cuisine is a genuine cultural experience and the best local restaurants serve their heartiest dishes in cooler months
Why is Reykjavik cool in December?
In December, Reykjavik feels the full influence of the continental polar air mass, which dominates mid-latitude interiors during winter. Cold, dry air from the north suppresses temperatures to 1°C during the day, dropping further to -3°C at night when radiative cooling is greatest. Precipitation tends to be low, as the cold air holds little moisture. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate -- wear sunscreen. UV 6-7: High -- hat and SPF 30+ essential. UV 8-10: Very High -- limit midday exposure. UV 11+: Extreme -- seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry -- skin and throat may feel parched. 40-60%: Comfortable -- ideal for most people. 60-80%: Sticky -- light, breathable fabrics recommended. Above 80%: Muggy -- heat feels more intense; quick-dry clothing is essential.
Frequently Asked Questions: Reykjavik in December
December ranks 12th sunniest of the year in Reykjavik, with an average 1 daily sunshine hours. The driest months are June, July, and October. July is the hottest month (14°C avg high); January is the coolest (1°C). From here, temperatures fall 0°C into January. Compared to last month (November: 3°C high, 16 rain days), December is cooler and wetter. December is one of the least sunny months, but that often means lower prices and fewer fellow tourists.
Year-Round Climate
Plan Your Trip to Reykjavik
Data Sources for Reykjavik
Climate normals represent 30-year averages (1991-2020). Individual years may vary.