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Trondheim, Norway climate
Cfb Oceanic / temperate
Trondheim has a seasonal cold-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is July with an average daily high near 68°F, while the coldest is January averaging around 25°F at night. Around 33 inches of precipitation falls each year, peaking in September (3.5 inches) and easing off in April (1.6 inches). At latitude 64°N, day length swings from 4.0 hours in midwinter to 20.0 hours at midsummer.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Trondheim climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 35 | 36 | 40 | 49 | 57 | 63 | 68 | 66 | 59 | 49 | 40 | 36 |
| Avg temp (°F) | 30 | 30 | 34 | 42 | 49 | 55 | 60 | 59 | 53 | 43 | 35 | 31 |
| Avg low (°F) | 25 | 25 | 28 | 35 | 41 | 48 | 53 | 52 | 46 | 37 | 30 | 25 |
| Precipitation (in) | 2.6 | 2.6 | 2.5 | 1.6 | 2.2 | 3.1 | 3.0 | 3.3 | 3.5 | 3.1 | 2.5 | 3.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 35 | 36 | 40 | 49 | 57 | 63 |
| Avg temp (°F) | 30 | 30 | 34 | 42 | 49 | 55 |
| Avg low (°F) | 25 | 25 | 28 | 35 | 41 | 48 |
| Precipitation (in) | 2.6 | 2.6 | 2.5 | 1.6 | 2.2 | 3.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 68 | 66 | 59 | 49 | 40 | 36 |
| Avg temp (°F) | 60 | 59 | 53 | 43 | 35 | 31 |
| Avg low (°F) | 53 | 52 | 46 | 37 | 30 | 25 |
| Precipitation (in) | 3.0 | 3.3 | 3.5 | 3.1 | 2.5 | 3.0 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 16 | 15 | 17 | 13 | 15 | 16 | 16 | 16 | 16 | 17 | 15 | 17 |
| Days with high ≥ 90°F (days) | — | — | — | — | — | 0.1 | 0.3 | — | — | — | — | — |
| Days with low ≤ 32°F (days) | 23 | 22 | 20 | 11 | 2 | 0.0 | — | — | 0.7 | 8 | 17 | 22 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 16 | 15 | 17 | 13 | 15 | 16 |
| Days with high ≥ 90°F (days) | — | — | — | — | — | 0.1 |
| Days with low ≤ 32°F (days) | 23 | 22 | 20 | 11 | 2 | 0.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 16 | 16 | 16 | 17 | 15 | 17 |
| Days with high ≥ 90°F (days) | 0.3 | — | — | — | — | — |
| Days with low ≤ 32°F (days) | — | — | 0.7 | 8 | 17 | 22 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 77 | 77 | 73 | 77 | 79 | 76 | 76 | 74 | 75 | 75 | 76 |
| Relative humidity (%) | 95 | 96 | 94 | 86 | 80 | 81 | 83 | 86 | 88 | 92 | 95 | 96 |
| Wind speed (mph) | 4.1 | 4.0 | 3.6 | 2.7 | 1.9 | 1.3 | 1.1 | 1.3 | 1.6 | 1.8 | 2.4 | 3.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 77 | 77 | 73 | 77 | 79 |
| Relative humidity (%) | 95 | 96 | 94 | 86 | 80 | 81 |
| Wind speed (mph) | 4.1 | 4.0 | 3.6 | 2.7 | 1.9 | 1.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 76 | 74 | 75 | 75 | 76 |
| Relative humidity (%) | 83 | 86 | 88 | 92 | 95 | 96 |
| Wind speed (mph) | 1.1 | 1.3 | 1.6 | 1.8 | 2.4 | 3.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Vaernes, a weather station, about 26 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.