Flensburg weather in December

In December, Flensburg sees average daytime highs of 5°C and overnight lows near 1°C, with 63 mm of precipitation across 12.6 wet days and about 7.1 hours of daylight. It is the 10th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 5°C in the first days to 4°C by the end. The sky is clear or mostly clear about 10% of the time in December, and the air most often feels dry.

Daylight stretches from about 7 h 24 min at the start of December to 7 hours by month's end. Set against the rest of the year, December is Flensburg's 12th-clearest and 3rd-windiest month. For the whole year in context, see Flensburg's year-round climate.

Daytime high
10th warmest
Overnight low
3rd coldest
Precipitation
63 mm
12.6 wet days
Daylight
7 hours
8:49 AM – 3:48 PM
Cloud cover
79%
12th clearest
Wind
17 km/h
3rd windiest
Solar energy
0.41 kWh/m²
Travel score
0.0
out of 10
Air quality
Moderate
PM2.5 11 µg/m³ · 2019

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 5°C in the first days to 4°C by the end.

A typical December day in Flensburg reaches about 5°C in the afternoon and slips back to 1°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between -0°C and 9°C. Set against its neighbours, December runs about 3°C cooler than November and about 1°C warmer than January.

-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
162
262
362
452
552
652
752
852
952
1051
1151
1251
1351
1451
1551
1651
1751
1851
1941
2041
2141
2241
2341
2440
2540
2640
2740
2840
2940
3040
3140

How December really feels in Flensburg

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 31 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
31
wind chill below the day's low

The story in December is cold — wind chill drags the overnight "feels like" below the raw low.

Flensburg weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6412.72.77.60.0
Feb / -0°4910.43.39.30.0
Mar / 5010.7211.50.8
Apr11° / 439.60.313.72.9
May16° / 5510.6015.84.8
Jun19° / 11°6811.6016.95.7
Jul21° / 13°7412.3016.56.1
Aug21° / 13°7612.8014.76.0
Sep17° / 11°6311012.55.2
Oct12° / 6612.6010.23.1
Nov / 5711.90.68.21.1
Dec / 6312.62.67.10.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 9% of December, with mostly cloudy or overcast conditions the remaining 80%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11981
21981
31882
41882
51882
61981
71981
81981
92080
102080
112080
122080
132179
142179
152179
162179
172179
182179
192080
201981
211981
221981
231981
241981
251981
262080
272080
282080
292080
302080
312179

Chance of precipitation in December

Any precipitationSnow

Flensburg gets around 63 mm of rain and snow over 12.6 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 40% and peaks near 43% on the wettest days, and about 3 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1376
2386
3386
4396
5406
6406
7417
8417
9417
10417
11417
12407
13407
14407
15407
16408
17408
18408
19408
20409
21409
22409
23409
24409
25419
26419
27429
28429
29429
30429
31439

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 17 km/h in December.

Across December, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 7 h 24 min at the start of December to 7 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over December. Sunrise moves from 8:31 AM to 8:55 AM, and sunset from 3:53 PM to 3:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
17.48:313:53
27.38:333:52
37.38:343:51
47.38:353:51
57.28:373:50
67.28:383:50
77.28:403:49
87.18:413:49
97.18:423:49
107.18:433:48
117.18:443:48
127.08:453:48
137.08:463:48
147.08:473:48
157.08:483:48
167.08:493:48
177.08:503:48
187.08:503:48
197.08:513:48
207.08:523:49
216.98:523:49
226.98:533:50
236.98:533:50
247.08:543:51
257.08:543:51
267.08:543:52
277.08:543:53
287.08:553:53
297.08:553:54
307.08:553:55
317.08:553:56

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.41 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.41 kWh/m² to a high of 5.55 kWh/m² in June across the year — December's 0.41 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.5Dim
20.5Dim
30.5Dim
40.5Dim
50.5Dim
60.5Dim
70.4Dim
80.4Dim
90.4Dim
100.4Dim
110.4Dim
120.4Dim
130.4Dim
140.4Dim
150.4Dim
160.4Dim
170.4Dim
180.4Dim
190.4Dim
200.4Dim
210.4Dim
220.4Dim
230.4Dim
240.4Dim
250.4Dim
260.4Dim
270.4Dim
280.4Dim
290.4Dim
300.4Dim
310.4Dim
Planning a trip in December

Is December a good time to visit Flensburg?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

0.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
8th-best month of the year

December is a weaker month for outdoor sightseeing in Flensburg.

What to pack for Flensburg in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Flensburg sees daytime highs around 5°C and nights near 1°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 13 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Flensburg in December

The nearest coast averages about 4°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 45 km away) is warmest in August at about 19°C and coldest in February near 2°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan3Bracing
Feb2Bracing
Mar3Bracing
Apr5Bracing
May11Bracing
Jun15Cool
Jul18Cool
Aug19Cool
Sep16Cool
Oct12Bracing
Nov9Bracing
Dec4Bracing

UV index in Flensburg in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 0. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Flensburg peaks around July 17 at about 5 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 17UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5High
Jun5High
Jul5High
Aug5High
Sep4Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Flensburg?

Flensburg sits at 54.8°N, 9.4°E, 33 m above sea level, in Germany. The nearest listed city is Sønderborg, 26 km away.

HaderslevRendsburg

Topography around Flensburg

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Flensburg.

Within 3 km, the terrain around Flensburg has only modest variations in elevation — a maximum elevation change of 82 m around an average of 37 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 99 m; within 80 km, only modest variations in elevation — a maximum elevation change of 144 m.

The land around Flensburg is covered by trees (45%) and artificial surfaces (33%) within 3 km, cropland (39%), grassland (25%) and trees (22%) within 16 km, and water (35%), cropland (31%) and grassland (21%) within 80 km.

3 km
82 m
16 km
99 m
80 km
144 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Sønderborg 26 km · Aabenraa 29 km · Schleswig 31 km · Tønder 40 km · Husum 42 km · Eckernförde 44 km · Haderslev 51 km · Rendsburg 56 km

Germany travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 80% of US
price level, 2025
GDP per capita
$60,496
2025
Happiness
6.9 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.9
per 100k, 2023
Road deaths
3.8
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 615
Religion
none 44%Roman Catholic 25%Protestant 23%other 5%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Flensburg (54.788°, 9.4372°, elevation 33 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).