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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 20°C, while the coldest is January averaging around −4°C at night. Around 839 mm of precipitation falls each year, peaking in September (89 mm) and easing off in April (42 mm). 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 (°C) | 2 | 2 | 5 | 9 | 14 | 17 | 20 | 19 | 15 | 9 | 5 | 2 |
| Avg temp (°C) | −1 | −1 | 1 | 5 | 10 | 13 | 16 | 15 | 11 | 6 | 2 | −1 |
| Avg low (°C) | −4 | −4 | −2 | 1 | 5 | 9 | 11 | 11 | 8 | 3 | −1 | −4 |
| Precipitation (mm) | 66 | 65 | 63 | 42 | 55 | 78 | 77 | 85 | 89 | 79 | 65 | 76 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 2 | 2 | 5 | 9 | 14 | 17 |
| Avg temp (°C) | −1 | −1 | 1 | 5 | 10 | 13 |
| Avg low (°C) | −4 | −4 | −2 | 1 | 5 | 9 |
| Precipitation (mm) | 66 | 65 | 63 | 42 | 55 | 78 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 20 | 19 | 15 | 9 | 5 | 2 |
| Avg temp (°C) | 16 | 15 | 11 | 6 | 2 | −1 |
| Avg low (°C) | 11 | 11 | 8 | 3 | −1 | −4 |
| Precipitation (mm) | 77 | 85 | 89 | 79 | 65 | 76 |
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 ≥ 32°C (days) | — | — | — | — | — | 0.1 | 0.3 | — | — | — | — | — |
| Days with low ≤ 0°C (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 ≥ 32°C (days) | — | — | — | — | — | 0.1 |
| Days with low ≤ 0°C (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 ≥ 32°C (days) | 0.3 | — | — | — | — | — |
| Days with low ≤ 0°C (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 (m/s) | 1.8 | 1.8 | 1.6 | 1.2 | 0.9 | 0.6 | 0.5 | 0.6 | 0.7 | 0.8 | 1.1 | 1.5 |
| 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 (m/s) | 1.8 | 1.8 | 1.6 | 1.2 | 0.9 | 0.6 |
| 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 (m/s) | 0.5 | 0.6 | 0.7 | 0.8 | 1.1 | 1.5 |
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.