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Climate in Trondheim (Norway)


Average weather, temperature, rainfall, sunshine hours

Flag - Norway

Trondheim, where it's located


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Climate chart - Trondheim
The climate of Trondheim is moderately continental, with cold winters, during which the average temperature is a few degrees below freezing, and mild summers.
The city is located is located in the county of Trøndelag, which occupies the central part of Norway. We are inside a large and deep fjord that flows into the west coast, and therefore there is a slightly colder and less rainy winter than the coast directly exposed to the Atlantic Ocean (in the part called Norwegian Sea). The result is an unsettled climate, which is affected by both the maritime influence from the west and the continental influence from the east.

The winter is cold and cloudy.
There are quite mild periods, more or less long depending on the winter, in which Atlantic currents prevail, the temperature exceeds freezing, it often rains and the wind blows.
There are also colder periods, when it can snow, and the temperature can drop below freezing. Snowfall can sometimes be abundant.
On the coldest nights of the year, the temperature can drop as low as -20 °C (-4 °F), but sometimes even as low as -25 °C (-13 °F).

The summer is mild, with fairly frequent rains. The days are very long.
There are periods characterized by rain and cool weather, with highs below 15 °C (59 °F). However, there are also periods when it does not rain and the temperature exceeds 20 °C (68 °F).
Occasionally, there may also be short hot periods, in which the temperature reaches 30 °C (86 °F). In July 2019, the temperature reached 33.5 °C (92.3 °F) at the airport, and exceeded 30 °C (86 °F) for six consecutive days. In June 2020, the heat record was broken, with 34.3 °C (93.7 °F).

Trondheim

The latitude of Trondheim is 63°26'N. On the shortest day of the year, December 21st, the sun rises at 10:00 am and sets at 2:30 pm. On the longest day, June 21, the sun rises at 3:00 am and sets at 23:40 pm. The white nights, in which it is not completely dark even at midnight, occur from April 30 to August 13.

Best Time


The best time to visit Trondheim is the summer, from June to August, since it is the mildest season. However, you must take into account some rainy days and a bit of cold at night.

Trondheim - Climate data


In Trondheim, the average temperature of the coldest month (January) is of -1.1 °C, that of the warmest month (July) is of 15.6 °C. Here are the average temperatures.
Trondheim - Average temperatures (1991-2020)
Temperatures (°C)
MonthMinMaxMean
January-4.11.9-1.1
February-4.12-1
March-2.24.61.2
April1.49.35.3
May5.313.89.5
June8.917.113
July11.419.815.6
August1119.115
September7.81511.4
October2.99.36.1
November-1.14.71.8
December-3.82.4-0.8
Year2.8106.35

Precipitation amounts to 845 millimeters per year: so, it is at an intermediate level. It ranges from 40 millimeters in the driest month (April) to 90 millimeters in the wettest one (September). Here is the average precipitation.
Trondheim - Average precipitation
MonthRain (mm)Days
January6512
February6512
March6513
April4010
May5511
June8013
July7511
August8513
September9013
October8013
November6511
December8014
Year845146

The sea temperature ranges from 6 °C in March to 13.5 °C in August. Here are the average sea temperatures.
Trondheim - Sea temperature
MonthTemperatures (°C)
January6.5
February6.5
March6
April6.5
May8
June10.5
July13
August13.5
September12.5
October10.5
November8.5">
December7.5
Year9.1

There are on average around 1250 sunshine hours per year. Here are the average hours of sunshine per day.
Trondheim - Sunshine hours
MonthAverageTotal
January0.510
February255
March2.585
April5155
May6.5200
June5.5170
July6185
August4.5145
September4125
October2.580
November135
December05
Year3.41250

Trondheim - Weather by month

Based on the period 1991-2020
(January - February - March - April - May - June - July - August - September - October - November - December)


January, the coldest month of the year, is generally a very cold month. The average temperature is of -1.1 °C, with a minimum of -4.1 °C and a maximum of 1.9 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -15.5 °C. However, it dropped to -25.6 °C in January 1996.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 8.5 °C. However, it reached 13.1 °C in January 2020.
Rain iconPrecipitation amounts to 65 mm, distributed over 12 days.
The day lasts on average 5 hours and 55 minutes. So the days are short.
Sun iconThere are on average 0.5 hours of sunshine per day. So, the sun shines 7% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of 15.5 kph.
Sea iconThe average sea temperature is of 6.7 °C. Therefore, the sea is very cold for swimming.


February is generally a very cold month. The average temperature is of -1 °C, with a minimum of -4.1 °C and a maximum of 2 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -15 °C. However, it dropped to -25.1 °C in February 2010.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 8 °C. However, it reached 12.5 °C in February 1998.
Rain iconPrecipitation amounts to 65 mm, distributed over 12 days.
The day lasts on average 8 hours and 50 minutes.
Sun iconThere are on average 2 hours of sunshine per day. So, the sun shines 22% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of 14.7 kph.
Sea iconThe average sea temperature is of 6.3 °C. Therefore, the sea is very cold for swimming.


March is generally a cold month. The average temperature is of 1.2 °C, with a minimum of -2.2 °C and a maximum of 4.6 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -12 °C. However, it dropped to -20.5 °C in March 2018.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 10.5 °C. However, it reached 14.4 °C in March 2019.
Rain iconPrecipitation amounts to 65 mm, distributed over 13 days.
The day lasts on average 11 hours and 55 minutes.
Sun iconThere are on average 2.5 hours of sunshine per day. So, the sun shines 23% of the time.
The average humidity is 70%. Hence, the air is normally humid.
The average wind speed is of 14.7 kph.
Sea iconThe average sea temperature is of 6.1 °C. Therefore, the sea is very cold for swimming.


April is generally a quite cold month. The average temperature is of 5.3 °C, with a minimum of 1.4 °C and a maximum of 9.3 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -5 °C. However, it dropped to -10.4 °C in April 1996.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 16.5 °C. However, it reached 23.3 °C in April 2019.
Rain iconPrecipitation amounts to 40 mm, distributed over 10 days.
The day lasts on average 15 hours and 5 minutes.
Sun iconThere are on average 5 hours of sunshine per day. So, the sun shines 34% of the time.
The average humidity is 67%.
The average wind speed is of 13.7 kph.
Sea iconThe average sea temperature is of 6.3 °C. Therefore, the sea is very cold for swimming.


May is generally a mild month. The average temperature is of 9.5 °C, with a minimum of 5.3 °C and a maximum of 13.8 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -0.5 °C. However, it dropped to -3 °C in May 2003.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 22.5 °C. However, it reached 27.8 °C in May 2018.
Rain iconPrecipitation amounts to 55 mm, distributed over 11 days.
The day lasts on average 18 hours and 20 minutes. So the days are very long.
Sun iconThere are on average 6.5 hours of sunshine per day. So, the sun shines 35% of the time.
The average humidity is 68%.
The average wind speed is of 13.8 kph.
Sea iconThe average sea temperature is of 7.8 °C. Therefore, the sea is very cold for swimming.


June is generally a mild month. The average temperature is of 13 °C, with a minimum of 8.9 °C and a maximum of 17.1 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 3 °C. However, it dropped to 0.1 °C in June 1997.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 25 °C. However, it reached 34.3 °C in June 2020.
Rain iconPrecipitation amounts to 80 mm, distributed over 13 days.
The day lasts on average 20 hours and 25 minutes. So the days are very long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
Sun iconThere are on average 5.5 hours of sunshine per day. So, the sun shines 27% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of 14.2 kph.
Sea iconThe average sea temperature is of 10.4 °C. Therefore, the sea is very cold for swimming.


July, the warmest month of the year, is generally a very mild month. The average temperature is of 15.6 °C, with a minimum of 11.4 °C and a maximum of 19.8 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 6.5 °C. However, it dropped to 3.7 °C in July 1995.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 27.5 °C. However, it reached 33.5 °C in July 2019.
Rain iconPrecipitation amounts to 75 mm, distributed over 11 days.
The day lasts on average 19 hours and 10 minutes. So the days are very long.
Sun iconThere are on average 6 hours of sunshine per day. So, the sun shines 31% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of 12.9 kph.
Sea iconThe average sea temperature is of 12.8 °C. Therefore, the sea is very cold for swimming.


August is generally a very mild month. The average temperature is of 15 °C, with a minimum of 11 °C and a maximum of 19.1 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 5 °C. However, it dropped to 2.6 °C in August 1995.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 26.5 °C. However, it reached 31.3 °C in August 1994.
Rain iconPrecipitation amounts to 85 mm, distributed over 13 days.
The day lasts on average 16 hours and 5 minutes. So the days are long.
Sun iconThere are on average 4.5 hours of sunshine per day. So, the sun shines 29% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of 12 kph.
Sea iconThe average sea temperature is of 13.7 °C. Therefore, the sea is very cold for swimming.


September is generally a mild month. The average temperature is of 11.4 °C, with a minimum of 7.8 °C and a maximum of 15 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 1.5 °C. However, it dropped to -2.3 °C in September 2013.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 22.5 °C. However, it reached 27.9 °C in September 1999.
Rain iconPrecipitation amounts to 90 mm, distributed over 13 days.
The day lasts on average 12 hours and 55 minutes.
Sun iconThere are on average 4 hours of sunshine per day. So, the sun shines 33% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of 12.9 kph.
Sea iconThe average sea temperature is of 12.4 °C. Therefore, the sea is very cold for swimming.


October is generally a quite cold month. The average temperature is of 6.1 °C, with a minimum of 2.9 °C and a maximum of 9.3 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -4.5 °C. However, it dropped to -10.8 °C in October 1992.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 16 °C. However, it reached 22.1 °C in October 2018.
Rain iconPrecipitation amounts to 80 mm, distributed over 13 days.
The day lasts on average 9 hours and 50 minutes.
Sun iconThere are on average 2.5 hours of sunshine per day. So, the sun shines 26% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is of 13 kph.
Sea iconThe average sea temperature is of 10.3 °C. Therefore, the sea is very cold for swimming.


November is generally a cold month. The average temperature is of 1.8 °C, with a minimum of -1.1 °C and a maximum of 4.7 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -10 °C. However, it dropped to -18.5 °C in November 2010.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 11.5 °C. However, it reached 16.1 °C in November 2005.
Rain iconPrecipitation amounts to 65 mm, distributed over 11 days.
The day lasts on average 6 hours and 40 minutes. So the days are short.
Sun iconThere is an average of 1 hour of sunshine per day. So, the sun shines 18% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is of 13.5 kph.
Sea iconThe average sea temperature is of 8.6 °C. Therefore, the sea is very cold for swimming.


December is generally a very cold month. The average temperature is of -0.8 °C, with a minimum of -3.8 °C and a maximum of 2.4 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -14 °C. However, it dropped to -22.4 °C in December 1993.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 9.5 °C. However, it reached 13.1 °C in December 2000.
Rain iconPrecipitation amounts to 80 mm, distributed over 14 days.
The day lasts on average 4 hours and 40 minutes. So the days are short. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
Sun iconThere are on average 0 hours of sunshine per day. So, the sun shines 4% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is of 14.4 kph.
Sea iconThe average sea temperature is of 7.3 °C. Therefore, the sea is very cold for swimming.

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