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Rønne, Denmark climate
BSk Cold semi-arid
Rønne has a seasonal cool-temperate climate (Cold semi-arid, Köppen BSk). The hottest month is August with an average daily high near 22°C, while the coldest is February averaging around −1°C at night. Precipitation totals about 197 mm a year and is strongly seasonal — July alone averages 34 mm while February barely receives 6 mm. At latitude 55°N, day length swings from 6.9 hours in midwinter to 17.1 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)Rønne climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 3 | 6 | 11 | 15 | 19 | 22 | 22 | 18 | 13 | 8 | 8 |
| Avg temp (°C) | 1 | 1 | 3 | 7 | 11 | 15 | 18 | 18 | 14 | 10 | 6 | 7 |
| Avg low (°C) | −1 | −1 | 0 | 3 | 7 | 10 | 13 | 14 | 11 | 7 | 4 | 6 |
| Precipitation (mm) | 17 | 6 | 17 | 8 | 16 | 22 | 34 | 33 | 19 | 10 | 6 | 8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 3 | 6 | 11 | 15 | 19 |
| Avg temp (°C) | 1 | 1 | 3 | 7 | 11 | 15 |
| Avg low (°C) | −1 | −1 | 0 | 3 | 7 | 10 |
| Precipitation (mm) | 17 | 6 | 17 | 8 | 16 | 22 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 22 | 18 | 13 | 8 | 8 |
| Avg temp (°C) | 18 | 18 | 14 | 10 | 6 | 7 |
| Avg low (°C) | 13 | 14 | 11 | 7 | 4 | 6 |
| Precipitation (mm) | 34 | 33 | 19 | 10 | 6 | 8 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 2 | 3 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | — | — | 0.1 | — | — | — | — |
| Days with low ≤ 0°C (days) | 9 | 9 | 8 | 3 | 0.3 | — | — | — | — | 0.9 | 3 | 6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 4 | 2 | 2 | 2 | 2 | 2 |
| Days with high ≥ 32°C (days) | — | — | — | — | — | — |
| Days with low ≤ 0°C (days) | 9 | 9 | 8 | 3 | 0.3 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 3 | 3 | 3 | 2 | 3 |
| Days with high ≥ 32°C (days) | — | 0.1 | — | — | — | — |
| Days with low ≤ 0°C (days) | — | — | — | 0.9 | 3 | 6 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 80 | 79 | 72 | 62 | 57 | 58 | 58 | 61 | 65 | 71 | 81 | 82 |
| Relative humidity (%) | 87 | 87 | 87 | 87 | 86 | 84 | 83 | 82 | 82 | 84 | 86 | 87 |
| Wind speed (km/h) | 26.2 | 24.7 | 21.6 | 17.8 | 16.2 | 17.0 | 17.2 | 18.4 | 21.4 | 23.7 | 24.6 | 25.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 80 | 79 | 72 | 62 | 57 | 58 |
| Relative humidity (%) | 87 | 87 | 87 | 87 | 86 | 84 |
| Wind speed (km/h) | 26.2 | 24.7 | 21.6 | 17.8 | 16.2 | 17.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 61 | 65 | 71 | 81 | 82 |
| Relative humidity (%) | 83 | 82 | 82 | 84 | 86 | 87 |
| Wind speed (km/h) | 17.2 | 18.4 | 21.4 | 23.7 | 24.6 | 25.9 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 20 years of daily observations at Bornholm Ronne, a weather station, about 5 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.