Trondheim climate
Trondheim (Norway) has a warm-summer humid continental climate (Köppen Dfb). The average temperature over the year is 6 °C43 °F, and about 1,482 mm58 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Trondheim climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 032 | −425 | −228 | 1295.1 |
| Feb | 033 | −424 | −228 | 1134.4 |
| Mar | 337 | −327 | 032 | 1174.6 |
| Apr | 846 | 134 | 540 | 943.7 |
| May | 1355 | 541 | 948 | 943.7 |
| Jun | 1762 | 948 | 1355 | 1345.3 |
| Jul | 1967 | 1253 | 1660 | 1335.2 |
| Aug | 1865 | 1152 | 1559 | 1365.3 |
| Sep | 1457 | 847 | 1152 | 1495.8 |
| Oct | 847 | 338 | 642 | 1234.8 |
| Nov | 338 | 031 | 135 | 1224.8 |
| Dec | 134 | −327 | −130 | 1405.5 |
| Year | 1967 | −424 | 643 | 1,48258 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 95% | 83% | 0.2 | 5:36 |
| Feb | 95% | 82% | 0.7 | 8:32 |
| Mar | 93% | 82% | 1.9 | 11:30 |
| Apr | 86% | 78% | 3.6 | 14:51 |
| May | 80% | 80% | 4.5 | 18:05 |
| Jun | 81% | 81% | 4.8 | 20:30 |
| Jul | 83% | 78% | 4.6 | 19:23 |
| Aug | 86% | 76% | 3.6 | 16:13 |
| Sep | 88% | 78% | 2.1 | 12:50 |
| Oct | 92% | 80% | 1.0 | 9:38 |
| Nov | 95% | 82% | 0.3 | 6:30 |
| Dec | 96% | 81% | 0.1 | 4:34 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Trondheim is like
The warmest month is July, with an average high of 19 °C67 °F and a low of 12 °C53 °F. The coldest is January, when highs average 0 °C32 °F and lows −4 °C25 °F. There is a clear seasonal cycle, with 17.7 °C31.9 °F between the average temperature of the warmest and the coolest month.
It is wet, with about 1,482 mm58 in of precipitation per year. Rain is spread fairly evenly through the year. The wettest month is September (149 mm5.8 in), the driest is April (94 mm3.7 in).
Relative humidity ranges from 80% in May to 96% in December. The clearest skies (lowest average cloud amount, 76%) are typical of August. Average wind speed near the ground ranges from 2 km/h (1 mph) in July to 6 km/h (4 mph) in January. Daylight lasts from about 4.6 hours in December to 20.5 hours in June.
A lasting snow cover is typical in November–April, when the average snow depth in the reanalysis exceeds 10 cm (deepest in February, about 21 cm).
Best time to visit Trondheim
Based on these averages, the most comfortable months for sightseeing and outdoor activities are July and August: average highs of 18 °C65 °F to 19 °C67 °F with 133 mm5.2 in to 136 mm5.3 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 0 °C32 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Trondheim
- Winter (December–February) — highs 032 to 1 °C34 °F, lows −424 to −3 °C27 °F, about 127 mm5.0 in of precipitation a month. Pack a winter coat, hat, gloves and warm, non-slip boots, shoes with good grip, as frost is common and an umbrella or light rain jacket.
- Spring (March–May) — highs 337 to 13 °C55 °F, lows −327 to 5 °C41 °F, about 102 mm4.0 in of precipitation a month. Pack a warm coat, layers and closed shoes and an umbrella or light rain jacket.
- Summer (June–August) — highs 1762 to 19 °C67 °F, lows 948 to 12 °C53 °F, about 134 mm5.3 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an umbrella or light rain jacket.
- Autumn (September–November) — highs 338 to 14 °C57 °F, lows 031 to 8 °C47 °F, about 131 mm5.2 in of precipitation a month. Pack a warm coat, layers and closed shoes and an umbrella or light rain jacket.
How Trondheim compares
Compared with Oslo, about 392 km to the south, Trondheim has practically the same average temperature and receives 42% more precipitation (1,482 mm58 in vs 1,047 mm41 in). The difference is largest in June (2.5 °C4.5 °F cooler).
Of the 6 places in Norway covered by World Climates, Trondheim is the 6th warmest by annual mean temperature and the 3rd wettest by annual precipitation. See all of them on the Norway climate page.
Places in other countries with the most similar temperature and rainfall pattern: Örebro (Sweden, Dfb), Jönköping (Sweden, Dfb) and Reykjavík (Iceland, Cfc).
Nearby places
- Oslo 392 km · 6 °C43 °F · 1,047 mm41 in
- Drammen 410 km · 7 °C44 °F · 1,285 mm51 in
- Bergen 429 km · 7 °C45 °F · 2,719 mm107 in
- Umeå 489 km · 4 °C39 °F · 816 mm32 in
- Örebro 528 km · 7 °C44 °F · 850 mm33 in
- Västerås 535 km · 7 °C44 °F · 741 mm29 in
- Uppsala 551 km · 6 °C44 °F · 704 mm28 in
- Stavanger 555 km · 9 °C47 °F · 1,787 mm70 in
Frequently asked questions
What is the warmest month in Trondheim?
July is the warmest month in Trondheim, with an average high of 19 °C (67 °F) and an average low of 12 °C (53 °F).
What is the coldest month in Trondheim?
January is the coldest month, with an average high of 0 °C (32 °F) and an average low of -4 °C (25 °F).
When does it rain the most in Trondheim?
September is the wettest month with about 149 mm (5.8 in) of precipitation; April is the driest with about 94 mm (3.7 in).
What is the best time to visit Trondheim?
Judging by long-term averages, the most comfortable months are July and August.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 263 m, while Trondheim lies at about 18 m. Temperatures on this page were therefore adjusted by +1.6 °C2.9 °F using the standard lapse rate of 6.5 °C per 1,000 m.