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Flensburg Weather in December
During December, Flensburg experiences low daytime temperatures of 6°C (43°F) and cooler nights around 1°C (34°F). As part of the winter season, expect quite a bit of rainfall. Around 71 mm (2.8 in) is typical.
Rainfall in Flensburg in December
Analyzing past climate data, one can expect approximately 18 days of rain, averaging 71 mm (2.8 in). Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.
Temperature in Flensburg in December
Temperatures in Flensburg in December top out at 6°C (43°F) and drop to 1°C (34°F) overnight. December is a notable month of the winter season. Even at the warmest part of the day, temperatures stay low. Dressing warmly from the start is the sensible approach. With lows around 1°C (34°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Flensburg in December
The city usually sees around 27 hours of sunlight, indicating fewer sunny days.If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Flensburg. Our weather planner can help you explore destinations with more pleasant weather conditions.
Flensburg Temperature in December
Min Temperature
1°C (34°F)
Max Temperature
6°C (43°F)
Chance of Rain
60%
Precipitation
71 mm (2.8 in)
Rainy days
18 days
Humidity
88% *
Sunshine
27 hours *
Percentage Sunshine
*
* Data from: Skrydstrup, Denmark (50 KM, 31 Miles).
Flensburg Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Flensburg - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Flensburg typically stay consistent throughout December, with daily highs averaging around 6°C (43°F). Nights are cold, with lows typically ranging from 0°C (32°F) to 2°C (36°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather records for Flensburg in December
Browse day-by-day weather records for Flensburg spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Flensburg historical weather extremes in December
According to our 49 years of weather records for Flensburg, the following extremes were recorded between 1976 and 2025.
- The warmest day in December was on December 24, 1977, with a maximum of 14°C (57°F).
- Flensburg experienced its chilliest December day on December 31, 1978, reaching only -8°C (18°F).
- The coldest night in December in Flensburg was on December 22, 2010, with a minimum of -15°C (5°F).
- Peak precipitation in December occurred on December 26, 2015, when 30 mm (1.2 in) of precipitation was measured.
Best Places in Germany in December
Find out more about the weather in Germany and which places have the best travel conditions in this month. See all of Germany in December →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Flensburg in December
Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Rain gear is recommended, you can expect wet weather on multiple days. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.
What To Do in Flensburg in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming4/10 -
Cycling4/10 -
Walking4/10 -
Camping4/10 -
Outdoor sports4/10
Flensburg 3-Day Forecast
More climate data for Flensburg
Temperature Rainfall Sunshine Humidity
See the full Flensburg climate overview or explore weather in Germany.
Popular in December
Where to go in December - average daytime high across popular destinations.
Düsseldorf
7°C (45°F) Cologne7°C (45°F) Hanover6°C (43°F) Binz
6°C (43°F) Munich5°C (41°F) Hamburg6°C (43°F) Berlin5°C (41°F) Winterberg4°C (39°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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