October Weather in Trondheim, Norway

Last updated: August 27, 2025

In October, the weather in Trondheim, Norway showcases a striking contrast, with maximum temperatures reaching 21°C (70°F) and dipping to a chilly -4°C (24°F) at night. The average temperature settles around 6°C (44°F), providing a brisk backdrop to the month. With an impressive precipitation total of 123 mm (4.8 in) over 19 days, residents and visitors can expect frequent rain, contributing to the region's lush landscapes. The humidity hovers at a high 93%, making the air feel particularly crisp and damp. Overall, October in Trondheim is characterized by its cool temperatures and vibrant foliage, inviting explorations through the picturesque autumn scenery.

October Temperature in Trondheim

In October, Trondheim, Norway, experiences a refreshing transition into autumn, showcasing vibrant foliage and crisp air. Temperatures begin to dip, with lows around -4°C (24°F), but daytime highs can reach a pleasant 21°C (70°F), offering a comfortable average of 6°C (44°F). This month serves as a bridge between the lingering warmth of September and the chillier conditions of November, revealing a distinct trend of decreasing temperatures as winter approaches. The crisp autumn days invite outdoor exploration, making the changing scenery all the more enchanting, as the city prepares for the cold months ahead.

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

The chart illustrates October 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, October 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.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Trondheim

In October, Trondheim experiences a notable shift in weather as the autumn leaves begin to fall. With 123 mm (4.8 in) of precipitation spread over 19 days, this month marks a peak in rainfall following the wetter September, which recorded 124 mm (4.9 in). The steady increase in precipitation days throughout the autumn months indicates a trend toward more frequent rainfall, as October leads into the wetter conditions of winter. This pattern highlights the transition from the relatively dry summer months, where precipitation was significantly lower, underscoring the city's characteristic, often unpredictable fall weather.

October Precipitation Trends in Trondheim

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

In October, Trondheim experiences a noticeable uptick in humidity, averaging around 93%, which marks a shift towards the wetter months of the year. Following the transition from summer, where humidity is at its lowest in June and July at 81%, there’s a gradual resurgence in moisture levels. This increase continues into the fall, as September's humidity sits at 90%. The trend suggests that as the city moves deeper into autumn, residents and visitors can expect crisper air but also a significant elevation in humidity, setting the stage for the even more humid conditions that define the winter months of November and December, when levels soar to 95% and 97%, respectively.

October Average Humidity in Trondheim

This chart illustrates the average monthly humidity levels in Trondheim, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, 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 October generated using information from the Copernicus Climate Change Service.

October UV Index in Trondheim

As October unfolds in Trondheim, the UV Index dips to 2, signaling a return to low exposure levels akin to the winter months. With a safe burn time of 45 minutes, locals and visitors can enjoy the crisp autumn air without the intense sun protection needed in the summer months, which saw indices peak at 6. This gradual decrease from summer's highs indicates a seasonal shift, emphasizing the need to transition from more frequent sun safety precautions back to less intense measures. As the days grow shorter and cooler, October serves as a gentle reminder of nature's rhythm, with just enough UV radiation to enjoy yet not enough to fret over. For more detailed information on UV levels throughout the year, visit Trondheim UV Index.

Maximum UV Index Levels in Trondheim for October

The chart shows the monthly maximum UV Index (UVI) for Trondheim in October, 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 October, the maximum UV index in Trondheim typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec112456653211
Data source: Trondheim October 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.

October Sunshine in Trondheim

As autumn settles in Trondheim, October brings a gentle shift in daylight, with 199 hours of sunshine illuminating the city. This month marks a noticeable decrease from the vibrant summer months, where July basked in an impressive 431 hours of sun. Despite the shorter days, October still offers a charming respite with its crisp air and vivid fall colors, reminiscent of the fading warmth of September's 258 hours. As the city transitions towards winter, the sunlight gradually wanes, but the allure of Trondheim's autumn beauty remains, inviting residents and visitors alike to embrace the season's serene splendor.

Monthly Sunshine Duration in Trondheim: October Highlighted

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

Chance of Sun in Trondheim During October

As October rolls into Trondheim, the likelihood of basking in sunny weather takes a noticeable dip, with a mere 14% chance of sunshine. This marks a stark contrast to the earlier months of the year; in fact, October holds the lowest probability for sunny days compared to any other month. Following the vibrant summer and early autumn months, characterized by slightly higher chances of sun, October ushers in a change with its short days and greyer skies, hinting at the winter chill that is just around the corner. Thus, if you're dreaming of sun-drenched escapes in Trondheim this October, it's best to adjust your expectations and prepare for more cloud cover than rays.

Percentage of Sunny Days in October in Trondheim

The chart illustrates the percentage of sunny days in Trondheim throughout the year, with October 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 October chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Trondheim in October

As October arrives in Trondheim, Norway, the transition into shorter days becomes evident, with daylight lasting about 9 hours. This marks a noticeable decline from the longer, sun-soaked days of summer—where June and July bask in nearly 20 hours of light—and continues the downward trend that began in September. Following the vibrant blooms of spring and the extended daylight of summer, October’s daylight serves as a gentle reminder of the approaching winter months, as it dips further toward November's mere 6 hours. The gradual dimming of the sky highlights a shift in the seasonal rhythm, inviting a cozy embrace of autumn's chill and changing leaves.

Average Daylight Hours in Trondheim for October

The chart illustrates the variation in daylight duration in Trondheim throughout the year, with October 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.

October Winds in Trondheim

As autumn settles in Trondheim, October brings a noticeable shift in the wind. With an average speed of 2.7 m/s (6 mph), this month marks a gentle increase from the calm breezes of summer, hinting at the changing seasons. While the winds were slightly brisker in March, October’s conditions remain relatively mild compared to the winter months that follow, providing a refreshing contrast to the dropping temperatures. Interestingly, October’s wind speed holds steady, aligning with November before ramping up in December as winter's chill sets in. This consistent but gentle wind further enhances the enchanting atmosphere of Trondheim during this picturesque time of year.

Average October Wind Speed in Trondheim

The chart displays monthly wind speed patterns in Trondheim, with values for each month shown alongside October's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how October's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.22.43.32.71.91.92.22.12.52.7 m/s2.52.9
Data source: Trondheim October wind data, generated using information from the Copernicus Climate Change Service.

How October 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 October’s weather to other months in Trondheim, focusing on differences in temperature, rainfall, humidity, and UV levels.

October and January present distinctly different weather patterns. In October, temperatures range from a minimum of -4°C (24°F) to a maximum of 21°C (70°F), with an average of 6°C (44°F). The month experiences significant rainfall, totaling 123 mm (4.8 in) over 19 days, along with high humidity at 93%. In contrast, January is much colder, with temperatures ranging from a minimum of -18°C (-1°F) to a maximum of 12°C (53°F) and an average of -2°C (29°F). Although January sees less precipitation at 94 mm (3.7 in) over 14 days, the humidity remains high at 96%. For a more detailed look at January's weather patterns, you can visit Trondheim weather in January.

In comparing the weather of October and February, October presents a milder climate with average temperatures ranging from a minimum of -4°C (24°F) to a pleasant maximum of 21°C (70°F). With an average precipitation of 123 mm (4.8 in) spread over 19 days, the month is quite wet and humid, maintaining a high humidity level of 93%. In contrast, February is significantly colder, with temperatures ranging from a chilly minimum of -25°C (-12°F) to a maximum of just 10°C (50°F). Although it is less rainy, with 75 mm (3.0 in) of precipitation over 13 days, the humidity remains high at 94%. For a more detailed look at February weather, check out Trondheim weather in February.

When comparing the weather in October and March, October presents a milder climate with average temperatures around 6°C (44°F) and highs reaching up to 21°C (70°F), while March is notably colder, with an average temperature of just 1°C (33°F) and a maximum of 14°C (58°F). Both months experience significant precipitation, with October receiving 123 mm (4.8 in) over 19 days and March slightly less at 111 mm (4.4 in) over 18 days. Humidity levels are quite high in both months, with October at 93% and March slightly lower at 91%. For a more detailed look at what to expect in March, check out Trondheim weather in March.

October and April present distinct weather patterns, with each month offering a unique climate experience. In October, average temperatures range from a chilly -4°C (24°F) to a comfortable 21°C (70°F), while April sees slightly lower averages, with a minimum of -12°C (11°F) and a maximum of 22°C (72°F). Precipitation is also a notable difference; October experiences more rain with 123 mm (4.8 in) across 19 days, compared to April's 93 mm (3.7 in) over 16 days. Humidity is higher in October at 93%, compared to April's 86%, adding to the autumnal feel of that month. For a deeper look into April's weather specifics, you can check Trondheim weather in April.

October and May present contrasting weather conditions, highlighting the transition between autumn and spring. In October, temperatures range from a chilly -4°C (24°F) to a milder 21°C (70°F), with an average of 6°C (44°F). This month also experiences significant precipitation, with 123 mm (4.8 in) falling over 19 days, contributing to a high humidity of 93%. In contrast, May offers a warmer experience, with temperatures ranging from -2°C (28°F) to 27°C (80°F) and an average of 9°C (49°F). Precipitation is lower at 70 mm (2.7 in) over 15 days, accompanied by a slightly lower humidity of 83%. For more details on May weather, you can visit Trondheim weather in May.

October and June present contrasting weather patterns. In October, temperatures can dip as low as -4°C (24°F), with an average of 6°C (44°F) and highs reaching 21°C (70°F). The month is marked by high humidity at 93% and significant rainfall, averaging 123 mm (4.8 in) over 19 days. In contrast, June offers warmer conditions, with minimum temperatures around 3°C (37°F) and daily averages hitting 14°C (57°F). The maximum temperature can soar up to 32°C (89°F), while precipitation is lighter, totaling 89 mm (3.5 in) over 14 days and lower humidity at 81%. For more details on June weather, visit Trondheim weather in June.

In Trondheim, the weather contrasts significantly between October and July. July witnesses warmer temperatures with a minimum of 5°C (41°F) and a maximum of 33°C (92°F), while October chills down to a minimum of -4°C (24°F) and averages only 6°C (44°F). Precipitation also differs, with October experiencing more rainfall at 123 mm (4.8 in) over 19 days compared to July's 88 mm (3.5 in) over 16 days. Additionally, October's humidity is higher at 93%, compared to July's more moderate 81%. For further details on July weather, visit Trondheim weather in July.

In comparing the weather of October and August, October presents a notably colder climate, with average temperatures ranging from a minimum of -4°C (24°F) to a maximum of 21°C (70°F). In contrast, August enjoys milder conditions, featuring average temperatures that start at 4°C (40°F) and peak at 31°C (88°F). Additionally, October experiences higher humidity levels at 93% and more precipitation, accumulating 123 mm (4.8 in) over 19 days, compared to August's 118 mm (4.6 in) over 15 days. For a more detailed look at August weather, you can check Trondheim weather in August.

In comparing the weather of October to September, October tends to be cooler with average temperatures dropping from 11°C (52°F) in September to 6°C (44°F). The minimum temperature in October can reach as low as -4°C (24°F), while September's minimum is a milder 2°C (36°F). Precipitation levels are quite similar, with October experiencing 123 mm (4.8 in) over 19 days compared to September's 124 mm (4.9 in) over 17 days. Additionally, October is slightly more humid, with humidity levels averaging 93% compared to September’s 90%. For more detailed insights on September weather, you can check Trondheim weather in September.

October typically offers milder weather compared to November, with average temperatures ranging from a minimum of -4°C (24°F) to a maximum of 21°C (70°F). In contrast, November sees a noticeable drop in temperature, with minimums reaching -14°C (7°F) and maximums only peaking at 14°C (57°F). Precipitation is more frequent in October, totaling 123 mm (4.8 in) over 19 days, while November experiences less rain, measuring 88 mm (3.5 in) across 13 days. Interestingly, November also tends to be slightly more humid, with levels reaching 95%. For more detailed information about the weather in November, you can visit Trondheim weather in November.

October weather in Trondheim is characterized by a more moderate temperature range, with minimums around -4°C (24°F) and average highs reaching 21°C (70°F). This transitional month experiences significant precipitation, totaling 123 mm (4.8 in) over approximately 19 days, accompanied by high humidity levels of 93%. In contrast, December sees much colder temperatures, with minimums dropping to -16°C (3°F) and average highs only reaching 10°C (50°F). The precipitation amounts remain relatively similar at 105 mm (4.1 in) over 15 days, but humidity rises to 97%. Overall, while October offers a transitional feel with warmer days, December brings a much chillier and potentially more wintry atmosphere. For more details, you can check Trondheim weather in December.

Compare Trondheim's Climate with Cities Worldwide

Conclusion: What to Expect From October Weather in Trondheim

As October unfolds in Trondheim, it brings a notable shift in weather compared to the milder months of summer. The temperatures begin to dip, averaging around 6°C (44°F), with chilling lows reaching -4°C (24°F), marking a clear departure from the warmth of previous seasons. Rain becomes more frequent, resulting in approximately 123 mm (4.8 in) of precipitation spread over 19 days, contributing to the city’s trademark humidity of 93%. Residents and visitors alike should brace for a visual transformation as vibrant autumn foliage contrasts with the increasingly overcast skies. To explore more about how these changes fit into Trondheim's overall climate, visit Trondheim Climate.