Flensburg weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Poor
Best time to visit: July – August
What is the weather like in Flensburg in December?
In December, Flensburg is cold: daytime highs average 5 °C, and nights cool down to about 1 °C. The sea averages 4.9 °C – swimming is only for the hardy. The sun is scarce, with only about 1 hours a day. Rain is frequent, with about 13 rainy days and 63 mm in total. Snow falls on about 2 days. All in all, December is not an ideal month for a holiday in Flensburg.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 8 | 8 | 7 |
| Day | 8° | 5° | 4° |
| Night | 4° | 1° | 0° |
| Sea | 9° | 5° | 3° |
| Sun | 2 h | 1 h | 1 h |
| Rain days | 12 | 13 | 13 |
More details for December
- Daylight
- 7 h 16 min08:39 – 15:55
- UV index
- 0 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 23 km/haverage daily peakAll months
- Cloud cover
- 80 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 2 days1 cm or more of fresh snowAll months
- Time zone
- UTC+1Europe/Berlin
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %0 %
- Few rainy daysweight 20 %38 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in December
- Warm jacket
- Rain jacket or umbrella
Flensburg in December: quick answers
Is Flensburg hot in December?
No. In December, Flensburg is cold: daytime highs average 5 °C and nights drop to about 1 °C.
Can you swim in Flensburg in December?
Only if you don't mind cold water: in December the sea averages just 4.9 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Flensburg in December?
Rain is frequent, with about 13 rainy days and 63 mm in total.
Flensburg month by month
The whole year in FlensburgAll destinations: GermanyGerman Baltic Coast weather in DecemberWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences