Sønderborg climate by month
What the weather is like
Sønderborg has an oceanic climate (Köppen Cfb): rain spread through the year and no real dry season.
The warmest month is July, when afternoons average 22° and nights 13°. January is the coolest month, with highs of 4° and lows of 0°. The difference between the warmest and the coolest month is about 16°.
About 764 mm of precipitation falls in an average year. August is the wettest month (74 mm, 15 wet days) and April the driest (37 mm, 8 wet days). Cloud cover ranges from 35% in July to 57% in January.
The sea reaches about 19° in August. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Copenhagen, the capital, Sønderborg is 0.1° warmer on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 22° · July
- Coldest nights
- 0° · January
- Wettest month
- August
- Driest month
- April
- Clearest skies
- July · 35% cloud
- Warmest sea
- 19° · August
- Longest day
- 17 h 19 min
- Shortest day
- 7 h 14 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 4° | 4° | 7° | 12° | 16° | 20° | 22° | 22° | 18° | 13° | 8° | 5° |
| Average low | 0° | 0° | 1° | 4° | 8° | 11° | 13° | 14° | 11° | 7° | 4° | 1° |
| Precipitation | 69 mm | 51 mm | 57 mm | 37 mm | 55 mm | 66 mm | 75 mm | 74 mm | 70 mm | 81 mm | 65 mm | 64 mm |
| Wet days (≥1 mm) | 14.3 | 10.9 | 10.1 | 8.4 | 10.4 | 11.1 | 13.4 | 15.3 | 12.4 | 14.1 | 14.5 | 14.6 |
| Cloud cover | 57% | 54% | 48% | 40% | 36% | 38% | 35% | 36% | 42% | 46% | 53% | 57% |
| Sea temperature | 3° | 2° | 3° | 5° | 11° | 15° | 18° | 19° | 16° | 12° | 9° | 4° |
| Daylight | 7h 47 | 9h 42 | 11h 46 | 14h 05 | 16h 06 | 17h 19 | 16h 49 | 15h 01 | 12h 47 | 10h 34 | 8h 27 | 7h 14 |
| Month score | 14 | 22 | 27 | 45 | 65 | 71 | 66 | 65 | 66 | 34 | 15 | 14 |