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Contents
- The climate of Trondheim
- The best time to visit Trondheim
- The worst time to visit Trondheim
- Spring weather in Trondheim
- Summer weather in Trondheim
- Autumn weather in Trondheim
- Winter weather in Trondheim
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average UV index
The climate of Trondheim
Detailing Trondheim's atmospheric situation reveals a location slotted into the Subarctic climate zone, according to the Köppen classification. With the label Dfc, it indicates the landscapes are besieged by severe winters with a noticeable absence of a dry season while summers are tepid at best. Trondheim nestles in the Norway's mid-coast region with the Norwegian Sea as its eternal neighbor.
Weather experiences in Trondheim transpire in full circle throughout the year, conditioned heavily by its northerly position and the sea's influence. Temperatures swerve from a biting -5°C (23°F), observed frequently during the icy winters, and top at a relatively mild 17°C (62.6°F) in the heart of summer. Rainfall exhibits mild fluctuations throughout the year, shifting from 53mm (2.09") in May to a maximum of 133mm (5.24") in September. Rain frequents Trondheim's days, averaging a tally of 17 to 24 rainy days each month, affirming its absence of a dry season. Ostensibly led by the seasonal length of the day, the amount of sunshine varies significantly between a low of 0 hours in December and January, up to a maximum of 7 hours in May and June.
Adding a unique twist to Trondheim's weather narrative is its daylight duration, a departure from conventional day-night rhythms. It experiences remarkably short daylight hours in the depth of winter, dropping to 4.7 hours in December. In contrast, summer month of June boasts of an extraordinary extended daylight of 20.4 hours, bathing the city in light and life.
Weather experiences in Trondheim transpire in full circle throughout the year, conditioned heavily by its northerly position and the sea's influence. Temperatures swerve from a biting -5°C (23°F), observed frequently during the icy winters, and top at a relatively mild 17°C (62.6°F) in the heart of summer. Rainfall exhibits mild fluctuations throughout the year, shifting from 53mm (2.09") in May to a maximum of 133mm (5.24") in September. Rain frequents Trondheim's days, averaging a tally of 17 to 24 rainy days each month, affirming its absence of a dry season. Ostensibly led by the seasonal length of the day, the amount of sunshine varies significantly between a low of 0 hours in December and January, up to a maximum of 7 hours in May and June.
Adding a unique twist to Trondheim's weather narrative is its daylight duration, a departure from conventional day-night rhythms. It experiences remarkably short daylight hours in the depth of winter, dropping to 4.7 hours in December. In contrast, summer month of June boasts of an extraordinary extended daylight of 20.4 hours, bathing the city in light and life.
The best time to visit Trondheim
The most favorable period to visit Trondheim extends from May to August. Temperatures during this stretch stabilize between 12°C (53.6°F) and 17°C (62.6°F), creating a comfortable atmosphere for sightseeing. Daylight hours raise to their zenith with June offering an impactful 20.4 daylight hours. Sea temperatures from June to August hover between 12.3°C (54.1°F) to 14.8°C (58.6°F), opening a window for bracing sea experiences. Rainfall is comparatively lower during these summer months, with May recording the least precipitation of 53mm (2.09").
The worst time to visit Trondheim
Observers may find Trondheim's winter months from November to March less attractive for leisure pursuits. Temperatures plunge irredeemably down to -5°C (23°F). The icy grip of winter attains its fullest expression in these months. Rainy days are numerous, and rainfall amount peaks towards the upper end of its yearly range, particularly in December with 123mm (4.84") of precipitation. While the surreal Northern Lights might lure the weather-hardened adventurer, daylight hours dip to their yearly minimum, sliding down to 4.7 hours in December.
Spring weather in Trondheim
In Trondheim, Spring unfolds from March to May, characterized by a gradual upturn of temperatures from 3°C (37.4°F) up to a balmy 12°C (53.6°F). The rain percentage registers a descending trend with rainfall reducing from 81mm (3.19") in March to 53mm (2.09") in May. These months also herald the return of the sun with sunshine hours elevating from 3 to 7 hours a day. Daylight also starts to lengthen considerably, swelling from 11.8 hours in March to a generous 18.2 hours by May.
Summer weather in Trondheim
Reminding of warmth, Trondheim's Summer spans from June to August. High temperatures oscillate within a narrow band from 16°C (60.8°F) to 17°C (62.6°F), while the low temperatures snugly fit between 8°C (46.4°F) and 9°C (48.2°F). The rainfall proves to be quite constant with a variation from 70mm (2.76") to 81mm (3.19"). The UV index hits its yearly high of 4, necessitating protective measures. Daylight reaches its pinnacle, with a fantastic 20.4 hours in June, and then slowly tapers down to 16.2 hours by August.
Autumn weather in Trondheim
Autumn stretches from September to November in Trondheim. It witnesses a gradual retreat of temperatures, dipping from 12°C (53.6°F) in September to a chilly 3°C (37.4°F) in November, while the minimum temperatures descend from 6°C (42.8°F) to -2°C (28.4°F). Rainfall sees a rise, ballooning from 133mm (5.24") in September to 100mm (3.94") in November while the number of rainy days keep consistent. With daylight hours shrinking to 6.7 by November, sunshine becomes a commodity with only 1 hour in that month.
Winter weather in Trondheim
From December to February, Winter masks Trondheim under its frosty spell. The mercury rarely ascends, floundering around 0°C (32°F), while the lows burrow into negative territories, down to -5°C (23°F). Trondheim gets a steady dosage of precipitation with rainfall hovering from 100mm (3.94") to 123mm (4.84"). Daylight hours plunge to their minimum, with December offering only 4.7 hours of daylight. The sun essentially goes on hiatus, bestowing no more than 1 hour of sunshine in December and January. However, winter brings its own magic in the form of the awe-inspiring Northern Lights.
Weather in January
January in Trondheim, Norway, ushers in a new year with the lowest temperatures of the year, ranging from a frigid -5°C (23°F) to a high of 0°C (32°F). The days are short and often quite dark, with daylight hours struggling to surpass the 6-hour mark, contributing to the chilly temperatures. Weather in January »
Weather in February
The short, cold days of January give way to slightly longer, but still brisk, February days in Trondheim. The temperatures continue to stay below freezing for both daytime highs and nighttime lows, similar to January's chilly conditions. Weather in February »
Weather in March
March ushers in the long-awaited spring, but winter refuses to loosen its grip entirely in Trondheim. The temperatures begin to edge upwards from -3°C (26.6°F) to 3°C (37.4°F), making it a tad more comfortable than February. Daylight hours also start to exceed the 10-hour mark, signalling a shift in seasons. Weather in March »
Weather in April
April in Trondheim marks the official arrival of spring. The temperatures finally reach positive figures from 0°C (32°F) to 6°C (42.8°F), leading to a noticeable increase in outdoor activities. The days also start to extend in length, with daylight hours nearing the 15-hour mark. Weather in April »
Weather in May
May is when Trondheim truly blossoms into spring. The once-frozen city starts to warm up with temperatures ranging from 4°C (39.2°F) to 12°C (53.6°F). The snow slowly retreats, replaced by blooming flowers and lush greenery. As the city is still not in the full grasp of summer, it experiences lesser rainfall than in the following months, making May a perfect month to explore the city’s scenic beauty. Weather in May »
Weather in June
June signals the start of summer in Trondheim, with temperatures on a steady rise from 8°C (46.4°F) to 16°C (60.8°F). Oddly enough, June ushers in almost as much rainfall as the wetter winter months, resulting in a fairly humid summer atmosphere. Weather in June »
Weather in July
July continues to ride on the coat tails of June, delivering warm temperatures, long daylight hours, and consistent precipitation. In contrast to the transition from June to July, temperatures now plateau from 9°C (48.2°F) to 16°C (60.8°F). Weather in July »
Weather in August
August is a bittersweet time in Trondheim, marking the gradual end of summer with temperatures ranging from 9°C (48.2°F) to 17°C (62.6°F). The daylight hours start to recede but remain significantly lengthy, offering ample time to enjoy the city's beauty. Weather in August »
Weather in September
September sees a noticeable drop in temperatures, slipping from 6°C (42.8°F) to 12°C (53.6°F), as Trondheim starts to welcome autumn. Even the longest day in September is shorter than the shortest day in August, signifying the approach of shorter daylight hours. Weather in September »
Weather in October
October is saturated with crisp autumn air and rapidly shortening days in Trondheim. The drop in temperatures continues from September, now ranging between 3°C (37.4°F) and 8°C (46.4°F). The already high rainfall in September continues its course into October, keeping the city relatively moist. Weather in October »
Weather in November
November in Trondheim kicks off with temperatures slipping below freezing, as winter starts to knock on the door. The temperatures continue to decline, ranging from -2°C (28.4°F) to 3°C (37.4°F), and daylight hours continue to diminish. Weather in November »
Weather in December
December marks the arrival of the long, dark Norwegian winter in Trondheim. Temperatures drop down to between -4°C (24.8°F) and 1°C (33.8°F) and daylight hours barely surpassing the 5-hour mark. The loss of daylight hours is accompanied by a surge in rainfall, making December a rather cold and damp month. Weather in December »
Updated: Jan 27, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Trondheim?
Trondheim's coldest season falls during January and February, averaging a high-temperature of 0°C (32°F).
How much does it rain in Trondheim?
In Trondheim, during the entire year, the rain falls for 239 days and collects up to 1096mm (43.15") of precipitation.
What are the months with the least sunshine in Trondheim?
The months with the least sunshine are January and December, with an average of 0h of sunshine.
When is the lowest UV index in Trondheim?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 0.
What is the month with the coldest sea water in Trondheim?
With an average sea temperature of 4.9°C (40.8°F), March is the month with the coldest seawater in Trondheim, Norway.
What is the driest month in Trondheim?
The month with the least rainfall is May, when the rain falls for 15 days and typically collects 53mm (2.09") of precipitation.
What are the months with the most sunshine in Trondheim?
The months with the most sunshine are May and June, with an average of 7h of sunshine.
When are the longest days in Trondheim?
With an average of 20h and 24min of daylight, June has the longest days of the year.
What is the month with the highest UV index in Trondheim?
The months with the highest UV index are June and July, with an average maximum UV index of 4.
What is the hottest time of year in Trondheim?
Temperature readings in Trondheim reach their annual highs in August, averaging 17°C (62.6°F) and a minimum average of 9°C (48.2°F).
What month is the sea warmest in Trondheim?
With an average sea temperature of 14.8°C (58.6°F), August is the month with the warmest seawater.
What is the rainiest month in Trondheim?
September is the month with the most rainfall. Rain falls for 24 days and accumulates 133mm (5.24") of precipitation.
When is Daylight Saving Time (DST) in Trondheim?
On Sunday, 27. October 2024, at 03:00, Daylight Saving Time ends in Trondheim, Norway, and the time zone changes from CEST to CET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 02:00, and the time zone reverts from CET to CEST.
What is the month with the shortest days in Trondheim?
With an average of 4h and 42min of daylight, December has the shortest days of the year.
Average temperature
Trondheim, Norway
The warmest month (with the highest average high temperature) is August (17°C).
The months with the lowest average high temperature are January and February (0°C).
The months with the highest average low temperature are July and August (9°C).
The coldest months (with the lowest average low temperature) are January and February (-5°C).
Average rainfall
Trondheim, Norway
The wettest month (with the highest rainfall) is September (133mm).
The driest month (with the least rainfall) is May (53mm).
Average rainfall days
Trondheim, Norway
- Average rainfall days in January:
22 days - Average rainfall days in February:
19 days - Average rainfall days in March:
18 days - Average rainfall days in April:
18 days - Average rainfall days in May:
15 days - Average rainfall days in June:
17 days
- Average rainfall days in July:
19 days - Average rainfall days in August:
19 days - Average rainfall days in September:
24 days - Average rainfall days in October:
23 days - Average rainfall days in November:
21 days - Average rainfall days in December:
24 days
The months with the highest number of rainy days are September and December (24 days).
The month with the least rainy days is May (15 days).
Average sea temperature
Trondheim, Norway
The best month for swimming (with the highest average sea temperature) is August (14.8°C).
The coldest month (with the lowest average sea temperature) is March (4.9°C).
Average daylight / Average sunshine
Trondheim, Norway
- Average daylight in January:
5h and 5min - Average daylight in February:
8h and 4min - Average daylight in March:
11h and 5min - Average daylight in April:
15h and 0min - Average daylight in May:
18h and 1min - Average daylight in June:
20h and 2min
- Average daylight in July:
19h and 1min - Average daylight in August:
16h and 1min - Average daylight in September:
13h and 0min - Average daylight in October:
9h and 5min - Average daylight in November:
6h and 4min - Average daylight in December:
4h and 4min
The month with the longest days is June (Average daylight: 20h and 24min).
The month with the shortest days is December (Average daylight: 4h and 42min).
The months with the most sunshine are May and June (Average sunshine: 7h).
The months with the least sunshine are January and December (Average sunshine: 0h).
Average UV index
Trondheim, Norway
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 0).
Trondheim, Norway
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