Last updated: August 27, 2025
December in Trondheim, Norway showcases a winter climate marked by temperatures that typically range from a brisk -16°C (3°F) to a mild 10°C (50°F). The average temperature hovers around -1°C (31°F), creating a chilly but picturesque atmosphere. With 105 mm (4.1 in) of precipitation spread over 15 days, expect a mix of snow and rain, contributing to a humid environment with levels soaring to 97%. This combination of cool temperatures and frequent precipitation sets the stage for a stunning, frosty landscape that defines Trondheim’s winter charm.
In December, Trondheim, Norway, unveils a chilly yet enchanting winter landscape, characterized by temperatures that dip to a frigid -16°C (3°F) at night and a modest daytime average hovering around -1°C (31°F). As the month unfolds, residents and visitors experience a gradual transition from the biting cold of November, where temperatures reached as low as -14°C (7°F), to more moderate conditions. The maximum temperature climbs to a crisp 10°C (50°F), providing a brief respite from the winter chill. Overall, December marks a significant part of Trondheim's winter, embodying the season's icy charm while hinting at the warmth of festive celebrations.
In December, Trondheim experiences a precipitation total of 105 mm (4.1 in) across approximately 15 days, bringing the year to a soggy close. This month's rainfall is a notable increase compared to November's 88 mm (3.5 in), reflecting the region's trend of heightened precipitation as winter sets in. December's moisture levels, while significant, are consistent with the overall pattern observed throughout the year, marked by high figures in the late summer and autumn months. As the days grow shorter and colder, the steady precipitation not only blankets the ground with snow but also contributes to the city's enchanting winter landscape, setting the stage for the festive season.
As the year draws to a close, December brings the highest humidity levels to Trondheim, Norway, peaking at an impressive 97%. This rise in moisture marks a notable trend, with humidity consistently elevated throughout the winter months, ascending from 94% in February to its December climax. The gradual increase from 81% in July and June reflects Trondheim's characteristic shift towards a more humid climate as the seasons change. Interestingly, while summer months flaunt lower humidity levels, the autumn transition sees a steady rise, culminating in December's peak. This pattern underscores Trondheim's distinctive blend of cold, crisp winters and damp air, shaping its unique atmospheric backdrop.
In December, Trondheim experiences a low UV Index of 1, similar to the preceding winter months of January and February, where exposure to ultraviolet rays remains minimal. With a burn time of 45 minutes, residents and visitors can enjoy the outdoors with limited risk of sunburn, making it an ideal time for winter activities. As the year progresses from winter to summer, the UV Index climbs significantly, peaking at 6 during the sunny months of June and July, where caution becomes necessary due to increased exposure risk. This trend highlights the importance of monitoring UV levels throughout the year in Trondheim. For detailed insights on the UV Index throughout the year, visit Trondheim UV Index.
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As December rolls into Trondheim, it brings a modest 60 hours of sunshine, marking a notable dip from the brighter months that follow. After basking in the glow of up to 431 hours in July, the city begins to face the darker days of winter. The trend is clear: as the year progresses from January's 57 hours towards the vibrant sprawl of spring, daylight peaks dramatically in April at 320 hours. However, December’s meager light serves as a gentle reminder of the seasonal shift, contrasting sharply with the hopeful increase in daylight that emerges as spring approaches. The gradual rise in sunlight throughout the early months of the year hints at the anticipation of brighter days ahead, making the eventual arrival of spring all the more cherished.
In Trondheim, Norway, the likelihood of experiencing sunny weather in December stands at 25%, a figure that reflects the city’s colder and darker winter months. This percentage is a modest increase compared to the preceding months, such as October and November, where sunny days are less frequent, dipping to 14% and 20% respectively. As the year winds down, December brings a slight uptick in sunshine chances, positioning it better than the late autumn months but still revealing the region's overall trend of prolonged cloud cover as winter takes hold. With this in mind, while the prospect of basking in sunlight may be slim, the invigorating crispness of a clear December day can be a refreshing surprise for residents and visitors alike.
In Trondheim, Norway, the transition through the months paints a vivid picture of changing daylight hours. The year begins with the bleakness of January, where daylight barely reaches 5 hours, gradually extending to 8 hours by February. As spring approaches, March brings a more promising 11 hours, culminating in the abundant light of April's 15 hours and May's 18 hours. The summer months peak in June, basking in almost 20 hours of daylight. However, this vibrant glow starts to wane as July (19 hours) flows into the warm hues of August (16 hours), draping the city in shorter days. As autumn sets in, September offers a respectable 12 hours, but daylight dwindles again to 9 hours in October and further declines to a mere 6 hours in November. By December, Trondheim faces its starkest challenge with just 4 hours of daylight, closing the year with a vivid reminder of nature's cycles. This rhythm not only highlights the beauty of seasonal change but also serves as a testament to the resilience needed to embrace the long winter ahead.
In Trondheim, Norway, the December winds pick up slightly, with an average speed of 2.9 m/s (6 mph), marking a noticeable shift as the year comes to a close. This increase reflects a midwinter trend, where the winds gradually intensify from the calmer summer months—averaging as low as 1.9 m/s (4 mph) in both May and June. As autumn sets in, winds remain relatively steady, hovering around 2.5 to 2.7 m/s (6 mph) from October through November. The December breeze feels invigorating, hinting at the approach of winter while staying manageable, reminiscent of the gradual transitions seen throughout the year in this beautiful coastal town.
Weather in Trondheim varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Trondheim, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January showcase a notable similarity in their winter characteristics, yet there are distinct differences. In December, temperatures range from a minimum of -16°C (3°F) to a maximum of 10°C (50°F), with an average of -1°C (31°F). The month sees significant precipitation, totaling 105 mm (4.1 in) over 15 days, and high humidity levels at 97%. In contrast, January experiences slightly cooler conditions with temperatures dipping to a minimum of -18°C (-1°F) and averaging -2°C (29°F), while the maximum reaches 12°C (53°F). Precipitation decreases slightly to 94 mm (3.7 in) over 14 days, with humidity at 96%. This shift indicates a continuation of winter's grip with just a subtle change in weather patterns. For more detailed insights, check out Trondheim weather in January.
In December, temperatures in Trondheim typically range from a chilly minimum of -16°C (3°F) to a mild maximum of 10°C (50°F), with an average temperature near freezing at -1°C (31°F). The month experiences considerable precipitation, with 105 mm (4.1 in) falling over about 15 days, contributing to a high humidity level of 97%.
In contrast, February brings even colder temperatures, with minimums plunging to -25°C (-12°F), while still maintaining a maximum of 10°C (50°F) and an average close to -2°C (29°F). Precipitation decreases to 75 mm (3.0 in) over 13 days, accompanied by a slightly lower humidity of 94%. For a more detailed look at what to expect during this time, you can visit Trondheim weather in February.
In December, temperatures in Trondheim typically range from a minimum of -16°C (3°F) to a maximum of 10°C (50°F), with an average around -1°C (31°F). The month sees considerable precipitation, averaging 105 mm (4.1 in) over 15 days, and a high humidity level of 97%. In contrast, March experiences even colder temperatures, with a minimum of -24°C (-12°F) and a maximum reaching 14°C (58°F), yielding an average of 1°C (33°F). Interestingly, March has slightly higher precipitation at 111 mm (4.4 in) over 18 days, despite a lower humidity level of 91%. For more detailed insights, you can check this link: Trondheim weather in March.
December and April present contrasting weather conditions. In December, temperatures plunge with an average around -1°C (31°F), dipping as low as -16°C (3°F) and occasionally reaching a maximum of 10°C (50°F). The month is characterized by high humidity at 97%, and precipitation occurs on about 15 days, totaling 105 mm (4.1 in).
In contrast, April marks a transition to milder temperatures, where the average rises to 5°C (40°F), with lows of -12°C (11°F) and highs of 22°C (72°F). This month experiences slightly less precipitation at 93 mm (3.7 in) but has rainfall spread over 16 days, leading to a notable decrease in humidity to 86%. To delve deeper into the weather specifics for this month, you can check Trondheim weather in April.
December and May in Trondheim present a stark contrast in weather conditions. In December, temperatures can plummet as low as -16°C (3°F) with an average of -1°C (31°F), while the maximum rarely exceeds 10°C (50°F). The month is characterized by high precipitation at 105 mm (4.1 in) over 15 days, coupled with nearly constant humidity at 97%. In contrast, May sees a significant warming trend, with temperatures ranging from a minimum of -2°C (28°F) to a comfortable maximum of 27°C (80°F) and an average of 9°C (49°F). Precipitation decreases to 70 mm (2.7 in) over the same number of days, and humidity drops to a more moderate 83%. For a detailed look at the weather in May, you can check out Trondheim weather in May.
December and June present starkly contrasting weather conditions. In December, temperatures can plunge as low as -16°C (3°F), with an average of -1°C (31°F) and a maximum reaching only 10°C (50°F). This cold month also sees high humidity levels of 97% and considerable precipitation, averaging 105 mm (4.1 in) over 15 days.
In contrast, June brings a refreshing warmth, with temperatures starting at a minimum of 3°C (37°F), averaging 14°C (57°F) and peaking at a pleasant 32°C (89°F). The precipitation is lighter, totaling 89 mm (3.5 in) across 14 days, and the humidity is notably lower at 81%. This dramatic shift from winter's chill to summer's warmth makes June a much more inviting time of year. For more details, you can check out Trondheim weather in June.
The weather in December in Trondheim is characterized by cold temperatures, with a minimum of -16°C (3°F) and an average around -1°C (31°F), making it a stark contrast to the warm summer month of July, where temperatures range from a minimum of 5°C (41°F) to a maximum of 33°C (92°F). December experiences significant precipitation averaging 105 mm (4.1 in) over 15 days, coupled with high humidity levels at 97%. In contrast, July sees slightly less precipitation at 88 mm (3.5 in) over 16 days and enjoys a more moderate humidity level of 81%. For a closer look at July's climate specifics, visit Trondheim weather in July.
December and August present stark contrasts in weather. In December, temperatures range from a chilly -16°C (3°F) to a mild 10°C (50°F), with an average of -1°C (31°F), and high humidity at 97%. This month sees significant precipitation, totaling 105 mm (4.1 in) over about 15 days, often resulting in a wintry landscape. In sharp contrast, August enjoys much milder weather with temperatures fluctuating between 4°C (40°F) and a warm 31°C (88°F), averaging 14°C (58°F). Although it has slightly higher precipitation at 118 mm (4.6 in) over the same number of days, August's lower humidity at 88% contributes to a more comfortable atmosphere. For more insights on August weather, you can check Trondheim weather in August.
December weather is characterized by much colder temperatures, with a minimum of -16°C (3°F) and a maximum of only 10°C (50°F), averaging around -1°C (31°F). In contrast, September offers a milder climate, where temperatures range from a minimum of 2°C (36°F) to a maximum of 22°C (71°F), with an average of 11°C (52°F). Although December experiences slightly less precipitation, totaling 105 mm (4.1 in) over 15 days, September sees a higher total of 124 mm (4.9 in) across 17 days. Furthermore, humidity levels are notably higher in December at 97%, compared to 90% in September. For more details, you can check Trondheim weather in September.
December weather in Trondheim is much colder than in October, with average temperatures hovering around -1°C (31°F) compared to October's milder average of 6°C (44°F). While October experiences a maximum of 21°C (70°F), December's warmest day only reaches 10°C (50°F). Precipitation remains significant in both months, with December receiving 105 mm (4.1 in) over 15 days and October slightly higher at 123 mm (4.8 in) over 19 days. Humidity levels are also higher in December at 97%, compared to October's 93%. For more details on October weather, you can visit Trondheim weather in October.
December generally experiences colder temperatures compared to November, with average temperatures dropping from 2°C (36°F) in November to around -1°C (31°F) in December. The minimum temperature in December can plunge to -16°C (3°F), while November sees a slightly milder minimum of -14°C (7°F). In terms of precipitation, December is wetter, receiving 105 mm (4.1 in) versus November's 88 mm (3.5 in), and it also features more rainy days, with precipitation occurring on 15 days in December compared to 13 days in November. Humidity levels are slightly higher in December at 97%, compared to November's 95%. For more detailed insights, check out Trondheim weather in November.
As December unfolds in Trondheim, the weather takes a notable turn, embracing the depths of winter. With average temperatures plummeting to around -1°C (31°F), it becomes significantly colder compared to the milder autumn months. The chill is compounded by high humidity levels reaching up to 97%, creating a damp and frosty atmosphere that can make it feel even colder. Precipitation is frequent, with around 15 days of rain or snow, accumulating to about 105 mm (4.1 in), which further differentiates December from the drier seasons earlier in the year. This combination of cold, moisture, and limited daylight defines Trondheim’s winter charm. For more insights on weather patterns, visit Trondheim Climate.