January Weather in Trondheim, Norway

Last updated: August 27, 2025

In Trondheim, Norway, January weather portrays a captivating yet chilly landscape. With a maximum temperature reaching 12°C (53°F) and an average of -2°C (29°F), the month features brisk days and frosty nights, plunging as low as -18°C (-1°F). Residents and visitors can expect ample precipitation, accumulating to 94 mm (3.7 in) over 14 wet days, illustrating the region's characteristic winter moisture. Coupled with a high humidity level of 96%, January in Trondheim is truly a time when the frosty air mingles with the soft whispers of falling snow, creating an enchanting winter wonderland.

January Temperature in Trondheim

In Trondheim, Norway, January boasts a chilly climate with temperatures ranging from a biting minimum of -18°C (1°F) to a more forgiving maximum of 12°C (53°F). The average temperature settles around -2°C (29°F), reflecting a deep winter chill that sets the stage for the month. Notably, January temperatures are milder compared to the following month, February, where the lows can plunge to -25°C (-12°F). However, as the winter progresses, temperatures gradually begin to rise, hinting at the impending arrival of spring. This trend underscores a significant climatic shift as the months advance, with March showing initial warmth and an average temperature of 1°C (33°F), paving the way for the increasingly pleasant weather that characterizes Trondheim's later months.

January Weather in Trondheim: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Trondheim, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trondheim, January typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec292833404857605752433531
Data source: Temperature data for Trondheim generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Trondheim

In January, Trondheim experiences a notable precipitation of 94 mm (3.7 in) over approximately 14 days, setting the tone for the winter months. As the year unfolds, February sees a decrease in both the amount of rain and the number of wet days, dropping to 75 mm (3.0 in) and 13 days. However, with the arrival of March, the city rebounds, recording its highest monthly precipitation of 111 mm (4.4 in) over 18 days, reflecting a transitional period where winter gradually gives way to spring. The precipitation trend remains relatively stable in April and May, before a slight dip in June. Notably, August and September emerge as the wettest months of the year, each surpassing 100 mm, while winter months generally showcase milder yet consistent rainfall, emphasizing Trondheim's characteristic maritime climate.

January Precipitation Trends in Trondheim

The chart displays monthly precipitation patterns in Trondheim, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Trondheim, January typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec94751119470898811812412388105
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

January Humidity in Trondheim

In January, Trondheim, Norway experiences its highest humidity levels, soaring to 96%, creating a chilly and damp atmosphere that lingers through the winter months. As the year progresses into February and March, humidity begins to gently decline, with figures resting at 94% and 91% respectively. However, this decline is gradual, and the air remains noticeably moist. April brings a slight reprieve at 86%, marking the transition to spring, yet humidity still remains elevated compared to many other regions. As we move into the summer months, humidity stabilizes around 81% in both June and July, before creeping back up to 88% in August as autumn approaches. The cooler months return with increasing humidity, peaking again at 97% in December. This cyclical pattern highlights Trondheim’s characteristic moist climate, where high humidity predominates, especially in the colder months, creating a unique and often atmospheric experience for residents and visitors alike.

January Average Humidity in Trondheim

This chart illustrates the average monthly humidity levels in Trondheim, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Trondheim is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec96%94%91%86%83%81%81%88%90%93%95%97%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Trondheim

In January, Trondheim experiences a UV Index of 1, categorizing exposure as low with a burn time of 45 minutes. This trend continues into February, where the UV Index remains the same, providing comforting consistency during the winter months. As we transition into March, the index increases slightly to 2, still within the low exposure range. However, come April, residents notice a shift, with the UV Index rising to 4—a moderate level, allowing for only 30 minutes before potential skin damage. The warming months of May through July see indices reach up to 6, indicating high exposure and shortening burn times to just 25 minutes. As summer fades and autumn arrives, August's index drops back to 5, followed by September's decline to 3 and a further retreat to 2 in October. Finally, the final months of the year, November and December, revert to a steady 1, reminding us of the cozy, low UV risks that characterize Trondheim's winter season. For more details about the UV levels throughout the year, check out Trondheim UV Index.

Maximum UV Index Levels in Trondheim for January

The chart shows the monthly maximum UV Index (UVI) for Trondheim in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Trondheim typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec112456653211
Data source: Trondheim January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

January Sunshine in Trondheim

In Trondheim, Norway, January brings a modest 57 hours of sunshine, setting the stage for a gradual increase as the months progress. By February, the days brighten significantly with 156 hours of sun, signaling the end of winter's gloom. March continues this upward trend with 241 hours, as the promise of spring becomes more palpable. April ushers in even more light, reaching 320 hours, while May shines brightly with an impressive 419 hours, making it one of the sunniest months. The warmth peaks in July with 431 hours, before a gentle decline begins in August, dropping to 372 hours. As autumn sets in, September offers 258 hours, and October follows with 199 hours, showcasing a softer sun as daylight hours shorten. Finally, the year wraps up as it began, with November providing 117 hours and December a mere 60 hours, a reminder of the long Nordic winters ahead. This cyclical pattern beautifully highlights Trondheim's journey from winter's darkness into the vibrant light of summer.

Monthly Sunshine Duration in Trondheim: January Highlighted

The January sunshine duration represents the total number of hours Trondheim experiences direct sunlight during the month of January, excluding cloudy or obstructed periods. This chart compares the sunshine duration of January with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec57h156h241h320h419h413h431h372h258h199h117h60h
Data source: Trondheim January Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Trondheim During January

In Trondheim, Norway, January boasts a 41% chance of sunny weather, making it the month with the highest likelihood of sunshine during the winter season. This optimism is contrasted sharply with the following months; February sees a slight dip to 35%, while March falls further to just 22%. As the year progresses into spring, the probability of sunny days begins to fluctuate, with April at 29%, before experiencing a gradual decline into the summer months, where the chances hover around 25-28%. Notably, the trend reveals a shifting pattern where clear skies often give way to a cloudier outlook, particularly as autumn approaches, culminating in a mere 14% chance of sun by October. Overall, Januar’s bright prospects stand out in contrast to the drearier skies that characterize much of the rest of the year.

Percentage of Sunny Days in January in Trondheim

The chart illustrates the percentage of sunny days in Trondheim throughout the year, with January highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Trondheim experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec41%35%22%29%28%25%28%28%20%14%20%25%
Data source: Trondheim January chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Trondheim in January

In Trondheim, Norway, January begins with a mere 5 hours of daylight, casting a long shadow over winter days. As the month of February unfolds, sunlight gradually increases to 8 hours, hinting at the promise of spring. The pace quickens in March, where daylight extends to 11 hours, igniting a sense of renewal. By April, the day stretches to 15 hours, and May follows suit with an impressive 18 hours, inviting residents outdoors to bask in the vibrant landscape. The pinnacle is reached in June, when the sun graces the city with 20 hours of daylight, creating a magical atmosphere for late-night adventures. However, the transition into July sees a slight decrease, bringing 19 hours of light, with sunlight gradually tapering off in August to 16 hours. The days continue to shorten through September with 12 hours, and the return of longer nights is felt in October at 9 hours. November and December offer just 6 hours and a mere 4 hours of daylight respectively, as Trondheim embraces the serene beauty of winter once more, illustrating a rhythmic ebb and flow of light throughout the year.

Average Daylight Hours in Trondheim for January

The chart illustrates the variation in daylight duration in Trondheim throughout the year, with January highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec5h 46m8h 40m11h 50m15h 3m18h 13m20h 19m19h 8m16h 5m12h 54m9h 44m6h 38m4h 41m
Data source: Trondheim daylight hours, calculated by summing the hours between sunrise and sunset for each day.

January Winds in Trondheim

January in Trondheim, Norway, greets residents with a gentle breeze, as the average wind speed hovers around 2.2 m/s (5 mph). This marks the beginning of a gradual upward trend, with February edging up slightly to 2.4 m/s. As spring approaches, the winds gain momentum, peaking in March at 3.3 m/s (7 mph) before settling back in the mild range across the warmer months. Notably, May and June experience a dip to 1.9 m/s, offering a respite from the gusts. However, as autumn rolls in, wind speeds steadily rise again, reaching 2.9 m/s in December, setting the stage for a return to the brisk conditions typical of Trondheim's winter climate. Overall, the wind patterns in Trondheim reveal a distinct seasonal rhythm, shifting from gentle whispers in the spring and summer to more robust breezes as winter beckons.

Average January Wind Speed in Trondheim

The chart displays monthly wind speed patterns in Trondheim, with values for each month shown alongside January's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how January's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.2 m/s2.43.32.71.91.92.22.12.52.72.52.9
Data source: Trondheim January wind data, generated using information from the Copernicus Climate Change Service.

How January Weather in Trondheim Compares to Other Months

Weather in Trondheim varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Trondheim, focusing on differences in temperature, rainfall, humidity, and UV levels.

January and February in Trondheim exhibit cold temperatures typical of winter, but with distinct differences. January sees a milder minimum temperature of -18°C (1°F) and a slightly warmer maximum at 12°C (53°F), with an average of -2°C (29°F). The month is also characterized by considerable precipitation, totaling 94 mm (3.7 in) over 14 days and high humidity at 96%. In contrast, February experiences an even colder minimum of -25°C (-12°F) and a max of 10°C (50°F), maintaining the same average of -2°C (29°F). Precipitation decreases to 75 mm (3.0 in) spread over 13 days, while humidity also drops slightly to 94%. Overall, while both months maintain similar averages, February tends to be colder and drier than January. Trondheim weather in February provides more detailed insights into the weather during this month.

January weather in Trondheim is characterized by chilly temperatures, with a minimum of -18°C (0°F) and an average of -2°C (29°F), while March shows a slight warming trend with temperatures ranging from -24°C (-12°F) to a maximum of 14°C (58°F), leading to an average of 1°C (33°F). Despite March having colder minimum temperatures than January, it boasts a higher maximum temperature and an overall increase in daily temperatures as winter gives way to spring. Additionally, March experiences slightly more precipitation, averaging 111 mm (4.4 in) over 18 days compared to January’s 94 mm (3.7 in) over 14 days. Humidity remains high in both months, but it’s marginally lower in March at 91% compared to January’s 96%. For more detailed weather insights, you can check Trondheim weather in March.

In January, temperatures in Trondheim can be quite harsh, with minimums plummeting to -18°C (1°F) and an average of around -2°C (29°F). The precipitation is notable, totaling 94 mm (3.7 in) over about 14 days, accompanied by a high humidity of 96%. In contrast, April brings a marked improvement in weather, with minimum temperatures still cold at -12°C (11°F) but an average rise to 5°C (40°F), peaking at a comfortable 22°C (72°F). Although precipitation remains similar at 93 mm (3.7 in), it occurs over a few more days, with humidity decreasing to 86%. For a detailed look at Trondheim's weather in April, you can visit Trondheim weather in April.

In January, Trondheim experiences frigid temperatures with a minimum of -18°C (1°F) and an average of -2°C (29°F), while May sees a significant warmth with temperatures ranging from a minimum of -2°C (28°F) to a pleasant average of 9°C (49°F) and a maximum reaching 27°C (80°F). January's weather is characterized by high humidity at 96% and frequent precipitation on 14 days, resulting in a total of 94 mm (3.7 in). In contrast, May welcomes sunnier days with lower humidity at 83% and less precipitation overall, totaling 70 mm (2.7 in) but spread over 15 days. For more details about the weather in Trondheim during May, you can visit Trondheim weather in May.

January and June in Trondheim present a stark contrast in weather patterns. In January, temperatures range from a frigid -18°C (1°F) to a milder 12°C (53°F), with an average temperature of -2°C (29°F). This colder month experiences significant humidity at 96% and sees around 94 mm (3.7 in) of precipitation over approximately 14 days. In contrast, June offers a much warmer climate, with temperatures ranging from a minimum of 3°C (37°F) to a pleasant maximum of 32°C (89°F) and an average of 14°C (57°F). June also has a similar precipitation level of 89 mm (3.5 in) across 14 days, but the humidity drops to 81%. For more detailed information about weather conditions in June, you can visit Trondheim weather in June.

January weather contrasts sharply with that of July in Trondheim. In January, temperatures can plummet to a minimum of -18°C (1°F), with an average of -2°C (29°F) and occasionally peaking at 12°C (53°F). The month is characterized by high humidity at 96% and experiences about 94 mm (3.7 in) of precipitation over 14 days. In contrast, July brings a milder climate, with minimum temperatures around 5°C (41°F) and average highs reaching 33°C (92°F). Although it only has slightly less precipitation at 88 mm (3.5 in), July is marked by lower humidity at 81% and sees rain on 16 days. For more information on the pleasant weather in July, you can visit Trondheim weather in July.

January and August in Trondheim present a stark contrast in weather conditions. In January, temperatures can plummet to a minimum of -18°C (1°F), with an average of -2°C (29°F) and a maximum of 12°C (53°F). The month is characterized by high humidity at 96% and significant precipitation, totaling 94 mm (3.7 in) over 14 days. In contrast, August experiences much milder temperatures, ranging from a minimum of 4°C (40°F) to a maximum of 31°C (88°F), with an average of 14°C (58°F). While August sees a slightly higher total rainfall of 118 mm (4.6 in) spread over 15 days, the humidity level is lower at 88%. For more detailed information on Trondheim's climate during this month, check out Trondheim weather in August.

January in Trondheim is characterized by frigid temperatures, with a minimum of -18°C (1°F) and an average of -2°C (29°F), while reaching a maximum of 12°C (53°F). The month sees considerable precipitation, totaling 94 mm (3.7 in) over approximately 14 days, accompanied by a high humidity of 96%. In contrast, September brings a milder climate, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 22°C (71°F) and an average of 11°C (52°F). This month experiences slightly more precipitation at 124 mm (4.9 in) over 17 days, with humidity levels at 90%. For more detailed information, check Trondheim weather in September.

In January, Trondheim experiences a colder climate, with temperatures ranging from a minimum of -18°C (1°F) to a maximum of 12°C (53°F), averaging around -2°C (29°F). The month sees significant precipitation, totalling 94 mm (3.7 in) over about 14 days and maintaining high humidity levels at 96%.

In contrast, October brings a milder atmosphere with temperatures ranging from -4°C (24°F) to 21°C (70°F), averaging 6°C (44°F). Although October experiences a slightly higher total precipitation of 123 mm (4.8 in) over 19 days, the humidity remains relatively high at 93%. For more detailed information, you can visit Trondheim weather in October.

In January, temperatures typically reach a minimum of -18°C (1°F) and an average of -2°C (29°F), with highs peaking at 12°C (53°F). The month is marked by significant precipitation, totaling 94 mm (3.7 in) over approximately 14 days, and the humidity remains high at 96%. In contrast, November experiences a milder climate, with minimum temperatures around -14°C (7°F) and an average temperature of 2°C (36°F). The highest temperatures can go up to 14°C (57°F), while precipitation is slightly lower at 88 mm (3.5 in) spread across 13 days, maintaining a humidity level of 95%. For more detailed insights, refer to Trondheim weather in November.

In comparing the weather of January and December, both months experience similar cold temperatures, with January averaging slightly cooler at -2°C (29°F) compared to December's average of -1°C (31°F). January sees a minimum temperature of -18°C (0°F), just a bit lower than December's minimum of -16°C (3°F). Precipitation is also notable in both months, with January receiving 94 mm (3.7 in) over approximately 14 days, while December has slightly higher precipitation at 105 mm (4.1 in) across 15 days. Humidity remains high in both months, peaking in December at 97%, just edging out January's 96% humidity. For a closer look at December's weather specifics, check out Trondheim weather in December.

Compare Trondheim's Climate with Cities Worldwide

Conclusion: What to Expect From January Weather in Trondheim

January in Trondheim presents a stark contrast to the milder months of the year, characterized by its chillier temperatures and significant precipitation. With an average temperature hovering around -2°C, it’s a time when the city experiences its coldest spells, dipping to frigid lows. The high humidity of 96% combined with frequent precipitation creates a damp atmosphere that can feel particularly biting. Unlike the summer months, where the days are long and sunny, January offers shorter daylight hours and a more austere landscape. For a deeper understanding of how Trondheim’s weather evolves throughout the year, visit the Trondheim Climate page.