Last updated: August 27, 2025
In December, Tromsø, Norway transforms into a winter wonderland, where temperatures typically range from a maximum of 8°C (46°F) to a brisk minimum of -21°C (-5°F), averaging around -4°C (25°F). The month is characterized by increased precipitation, with 80 mm (3.1 inches) falling over 15 days, resulting in a chilly yet enchanting atmosphere. With humidity soaring at an impressive 94%, the air feels crisp and invigorating, perfect for experiencing the magic of the Arctic winter. Embrace the unique blend of stark beauty and atmospheric charm that December brings to this northern jewel.
In December, Tromsø, Norway, experiences a sharp chill, with temperatures diving to a minimum of -21°C (-5°F) and an average hovering around -4°C (25°F). This marks a slight drop from November’s frigid figures, but the city’s winter charm remains as captivating as ever. With a maximum temperature reaching a modest 8°C (46°F), December is a time to embrace the Arctic vibe, marked by shorter days and the enchanting dance of the Northern Lights. The air is crisp, and each breath comes with a frosty bite, setting the stage for winter adventures amid breathtaking landscapes.
In December, Tromsø experiences a notable decrease in precipitation, with 80 mm (3.1 in) falling over 15 days. This marks a gentle decline compared to the preceding months, particularly November, which recorded 113 mm over 19 days. The shift hints at the approach of winter's chill, as the city transitions into a snowier period. Although less rainy, December's weather still keeps Tromsø vibrant, ensuring that the picturesque landscapes remain draped in a subtle layer of white, making it a magical backdrop for the festive season. Overall, the precipitation trend showcases a gradual decline into the winter months, providing a brief respite before the snow takes center stage.
In Tromso, Norway, December ushers in a humidity level of 94%, marking a slight increase as the year draws to a close. Observing the trend from earlier months, it's evident that the city maintains a consistently high humidity throughout the winter months, with January peaking at 95%. As temperatures begin to moderate in the spring, humidity gradually decreases, reaching its lowest point of 83% in May. However, as summer fades into fall, humidity levels rise again, reflecting a natural pattern of moisture retention in the air. The December climate, steeped in crisp arctic air, emphasizes Tromso's unique position within Norway's diverse meteorological landscape, where the chilly atmosphere combines with high humidity levels, creating a distinctive winter experience.
In December, Tromsø, Norway experiences its lowest UV Index, registering at 0, which falls into the low exposure category. This means that residents and visitors can enjoy the outdoors without the worry of sunburn, with a safe burn time of 45 minutes. The gradual transition from the higher UV levels seen in the summer months, peaking at 5 in July and June, showcases a clear trend where daylight diminishes and the sun's intensity decreases as winter sets in. It's a refreshing change from the sunnier seasons, allowing for cozy winter activities amidst the breathtaking Arctic scenery. For more detailed information on UV exposure throughout the year, you can check the Tromso UV Index.
UV Risk Categories
December in Tromsø, Norway, is characterized by the intense embrace of winter darkness, as the city receives no hours of sunlight during this month. This stark contrast follows a gradual increase in daylight, starting with a mere 11 hours in January and culminating in a vibrant peak of 454 hours in July. The gradual rise from February onward highlights the transition from the long, dark winter nights to the sunnier months, with March and April showing significant growth in daylight hours. By the time December rolls around, the cold grips the landscape, leaving behind the bright memories of spring and summer, as the cycle of light and dark continues in this Arctic wonderland.
In December, the likelihood of sunny weather in Tromsø, Norway, shows a promising uptick with a 34% chance of sunshine. This marks a notable increase compared to the preceding months, especially as winter deepens. While the sun's presence diminishes significantly from July's peak of 16% to October's low of 15%, December stands out as a bright moment in the gloomy winter landscape. This slight rebound in sunshine as the year draws to a close suggests a unique charm for visitors, offering glimpses of light amidst the long polar nights, making December an intriguing month to experience the beauty of Tromsø.
In Tromsø, Norway, the changing seasons bring dramatic variations in daylight duration throughout the year. As winter sets in, December plunges the city into a period of complete darkness, with zero hours of daylight, marking the peak of the polar night. This stark absence of sunlight is starkly contrasted just a few months earlier, in September, when daylight still graces the city for about 13 hours. As we transition into spring, the sun begins to reappear, increasing daylight to a full 16 hours by April and peaking with a remarkable 24 hours of continuous sunlight in June. The gradual shift from the long, sunlit days of summer back to the short, shadowy days of winter underscores Tromsø's unique Arctic environment, where the rhythm of light and dark shapes both the landscape and the lifestyle of its residents.
As the December winds sweep through Tromsø, Norway, they offer a gentle reminder of the winter chill, with an average speed of 2.5 m/s (6 mph). This month sees a continuation of the mild wind patterns established in the preceding months, maintaining a consistent breeziness that ranges from 2.3 to 3.0 m/s throughout the year. Notably, December's winds align closely with the stillness of autumn, suggesting a serene transition into the vibrant Arctic winter. While slightly cooler air begins to set in, these gentle gusts provide a hint of warmth amidst the growing cold, embodying the unique climate rhythm of this enchanting northern city.
Weather in Tromso varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Tromso, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January in Tromsø both showcase cold and wintry weather, but with some notable differences. In December, temperatures range from a minimum of -21°C (-5°F) to a maximum of 8°C (46°F), with an average temperature of -4°C (25°F). This month experiences approximately 80 mm (3.1 in) of precipitation over 15 days, coupled with a high humidity of 94%.
January, on the other hand, is slightly colder, with minimum temperatures plummeting to -23°C (-9°F) and a maximum of 7°C (45°F), resulting in an average temperature of -5°C (23°F). Precipitation also increases to 97 mm (3.8 in), although it falls over just 13 days, and humidity remains high at 95%. For more details about January's weather in Tromsø, you can explore Tromso weather in January.
In December, the weather in Tromsø is characterized by a milder average temperature of -4°C (25°F), with daily highs reaching up to 8°C (46°F). The month experiences substantial precipitation, totaling 80 mm (3.1 in) over 15 days and high humidity at 94%. In contrast, February sees slightly colder conditions, with an average temperature of -6°C (21°F) and a max of 7°C (44°F). Precipitation increases to 99 mm (3.9 in) and occurs over 16 days, paired with a marginally lower humidity of 93%. For a more comprehensive overview of Tromsø's weather in February, you can visit Tromso weather in February.
In December, the weather in Tromsø is characterized by colder temperatures, with a minimum of -21°C (-5°F) and an average of -4°C (25°F) during the month. This period sees around 80 mm (3.1 in) of precipitation spread across 15 days, accompanied by high humidity levels at 94%. By contrast, March offers slightly milder conditions, with temperatures ranging from a minimum of -18°C (1°F) to a maximum of 9°C (48°F), averaging -3°C (26°F). Additionally, March experiences higher precipitation, totaling 139 mm (5.5 in) over 19 days, and a slightly lower humidity of 91%. For more details, you can check out Tromso weather in March.
In December, temperatures in Tromsø can be quite frigid, with minimums reaching -21°C (-5°F) and an average temperature of -4°C (25°F). The month experiences substantial precipitation, totaling 80 mm (3.1 in) over about 15 days, accompanied by high humidity at 94%. In contrast, April brings a noticeable warming trend, with minimum temperatures of -14°C (7°F) and an average of 0°C (33°F), peaking at 14°C (57°F). The precipitation levels rise to 119 mm (4.7 in), with rainfall occurring on approximately 17 days. Despite the warmer weather, humidity remains relatively high at 89%. For more detailed insights into the weather during this spring month, you can visit Tromso weather in April.
December and May present strikingly different weather patterns. In December, temperatures can plunge as low as -21°C (-5°F), with an average of -4°C (25°F) and a peak of 8°C (46°F), creating a frigid atmosphere. The month sees significant precipitation, totaling 80 mm (3.1 in) over about 15 days, accompanied by a high humidity level of 94%. In contrast, May offers a more moderate climate, with temperatures ranging from a minimum of -8°C (18°F) to a comfortable maximum of 21°C (70°F) and an average of 5°C (41°F). Precipitation increases slightly to 98 mm (3.9 in) over 17 days, and humidity drops to 83%. For a detailed look at what to expect during this spring month, check out Tromso weather in May.
In December, Tromsø experiences harsh winter conditions, with temperatures ranging from a frigid -21°C (-5°F) to a maximum of 8°C (46°F), along with high humidity at 94%. The month is marked by about 15 days of precipitation amounting to 80 mm (3.1 in), creating a chilly and damp atmosphere. In contrast, June brings a significant transformation, with temperatures ranging from a minimum of 1°C (34°F) to a pleasant maximum of 23°C (73°F) and an average of 9°C (49°F). While June sees a slightly higher precipitation of 130 mm (5.1 in) over 18 days, the overall feel is much milder, and the lower humidity at 84% contributes to a more comfortable climate. For more details, check out Tromso weather in June.
In December, Tromsø experiences frigid temperatures, with a minimum of -21°C (-5°F) and an average of -4°C (25°F), making it one of the coldest months of the year. The region sees significant precipitation, totaling around 80 mm (3.1 in) over approximately 15 days, coupled with high humidity levels of 94%. In contrast, July brings a much milder climate, with temperatures ranging from a minimum of 5°C (41°F) to a pleasant maximum of 28°C (82°F) and an average of 12°C (54°F). While July has slightly more precipitation at 100 mm (4.0 in) over 14 days, the humidity is lower at 85%. For more details on Tromsø's summer weather, visit Tromso weather in July.
In December, Tromsø experiences frigid temperatures, with averages hovering around -4°C (25°F) and extremes reaching as low as -21°C (-5°F), making it one of the coldest months of the year. The precipitation level is relatively moderate at 80 mm (3.1 in) over about 15 days, accompanied by high humidity at 94%, contributing to a chilly and damp atmosphere.
In contrast, August showcases a much milder climate, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 27°C (80°F), and an average temperature of 11°C (53°F). With 128 mm (5.0 in) of rain spread over approximately 19 days, August is wetter, but the lower humidity level at 88% adds a different feel to the summer days. For more details on the weather during this time, visit Tromso weather in August.
December and September present contrasting weather conditions, reflecting the transition from autumn to winter. In December, temperatures can plummet to a minimum of -21°C (-5°F), with an average of -4°C (25°F) and a peak of only 8°C (46°F). The month experiences significant precipitation, totaling 80 mm (3.1 in) over about 15 days, and humidity remains high at 94%.
In contrast, September enjoys milder temperatures, with a minimum of -1°C (30°F) and an average of 8°C (47°F), peaking at a more comfortable 20°C (69°F). Though it experiences slightly more precipitation at 132 mm (5.2 in) across 17 days, the humidity is lower at 91%. For a closer look at Tromsø's weather during this transitional month, visit Tromso weather in September.
In comparing the weather between October and December, December is notably colder, with average temperatures hovering around -4°C (25°F) compared to October's milder average of 3°C (37°F). The minimum temperatures in December can dip to -21°C (-5°F), while in October, the lowest recorded is -11°C (13°F). Precipitation levels are somewhat similar, with December experiencing 80 mm (3.1 in) over 15 days and October seeing 87 mm (3.4 in) across 16 days. Humidity remains high in both months, with December at 94% and October slightly lower at 92%. For more details, visit Tromso weather in October.
In comparing the weather between November and December, December tends to be slightly milder, with an average temperature of -4°C (25°F) compared to November's -1°C (31°F). However, November experiences a lower minimum temperature of -22°C (-7°F) and a slightly higher maximum temperature of 10°C (50°F). Precipitation is more frequent in November, occurring over 19 days with a total accumulation of 113 mm (4.5 in), while December sees precipitation on only 15 days, totaling 80 mm (3.1 in). Humidity levels remain high in both months, with December at 94% and November at 92%. For a more detailed look at November weather, visit Tromso weather in November.
As December sets in, Tromsø transforms into a winter wonderland, with temperatures dipping to their chilly averages while still allowing for the occasional mild day. The month is marked by high humidity and frequent precipitation, creating a pristine layer of snow that blankets the landscape. Unlike the milder temperatures experienced in the fall, December's cold can be quite intense, with nights plunging into absolute chill. With about half the month witnessing some form of precipitation, it’s a time when the city embraces its enchanting Arctic atmosphere. Discover more about the unique climate conditions of this breathtaking destination by visiting Tromso Climate.