Altstadt Sud weather in December

In December, Altstadt Sud sees average daytime highs of 6°C and overnight lows near 2°C, with 101 mm of precipitation across 16 wet days and about 7.8 hours of daylight. It is the 11th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 6°C through the month. The sky is clear or mostly clear about 12% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 hours at the start of December to 7 h 48 min by month's end. Set against the rest of the year, December is Altstadt Sud's 12th-clearest and 2nd-windiest month. For the whole year in context, see Altstadt Sud's year-round climate.

Daytime high
11th warmest
Overnight low
3rd coldest
Precipitation
101 mm
16 wet days
Daylight
7 h 42 min
8:37 AM – 4:20 PM
Cloud cover
76%
12th clearest
Wind
14 km/h
2nd windiest
Solar energy
0.61 kWh/m²
Travel score
0.3
out of 10

Altstadt Sud is city quarter of Cologne No. 101.

Density
11,659/km²
people per km²

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 6°C through the month.

A typical December day in Altstadt Sud reaches about 6°C in the afternoon and slips back to 2°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 1°C and 11°C. Set against its neighbours, December runs about 3°C cooler than November and on par with January.

-10°-5°10°15°151015202531
Avg high (°C)Avg low (°C)
173
272
362
462
562
662
762
862
962
1062
1162
1262
1362
1462
1562
1662
1762
1862
1962
2062
2162
2261
2351
2451
2551
2651
2751
2851
2951
3051
3151

How December really feels in Altstadt Sud

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.

Altstadt Sud weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 9014.82.88.20.1
Feb / 7412.73.49.70.5
Mar10° / 7313.71.311.52.1
Apr14° / 5210.80.213.54.1
May18° / 10°6211.9015.35.5
Jun21° / 12°7012.2016.26.0
Jul23° / 15°8013.2015.86.3
Aug23° / 14°8011.9014.36.4
Sep19° / 11°7111.3012.45.8
Oct14° / 8312.8010.43.8
Nov / 8514.20.78.71.5
Dec / 101163.27.80.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 10% of December, with mostly cloudy or overcast conditions the remaining 78%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22278
32278
42377
52377
62377
72377
82377
92377
102476
112377
122377
132377
142278
152278
162278
172179
182179
192179
202179
212179
222179
232179
242179
252179
262179
272179
282179
292179
302278
312278

Chance of precipitation in December

Any precipitationSnow

Altstadt Sud gets around 101 mm of rain and snow over 16 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 51% and peaks near 55% on the wettest days, and about 3 days bring snow. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1457
2457
3467
4467
5477
6477
7487
8488
9498
10498
11508
12509
13509
14519
155110
165210
175210
185311
195311
205412
215412
225412
235413
245513
255513
265512
275412
285412
295411
305411
315410

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 14 km/h in December.

Across December, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 hours at the start of December to 7 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 8:21 AM to 8:43 AM, and sunset from 4:23 PM to 4:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.08:214:23
28.08:224:22
38.08:234:22
47.98:254:22
57.98:264:21
67.98:274:21
77.98:284:20
87.88:294:20
97.88:304:20
107.88:314:20
117.88:324:20
127.88:334:20
137.88:344:20
147.78:354:20
157.78:364:20
167.78:374:20
177.78:374:20
187.78:384:20
197.78:394:21
207.78:394:21
217.78:404:22
227.78:404:22
237.78:414:22
247.78:414:23
257.78:414:24
267.78:424:24
277.78:424:25
287.78:424:26
297.78:424:26
307.78:424:27
317.88:434:28

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.61 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.61 kWh/m² to a high of 5.27 kWh/m² in June across the year — December's 0.61 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.7Dim
20.7Dim
30.7Dim
40.7Dim
50.7Dim
60.7Dim
70.7Dim
80.7Dim
90.7Dim
100.7Dim
110.6Dim
120.6Dim
130.6Dim
140.6Dim
150.6Dim
160.6Dim
170.6Dim
180.6Dim
190.6Dim
200.6Dim
210.6Dim
220.6Dim
230.6Dim
240.6Dim
250.6Dim
260.6Dim
270.6Dim
280.6Dim
290.6Dim
300.6Dim
310.6Dim
Planning a trip in December

Is December a good time to visit Altstadt Sud?

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

0.3
Sightseeing
11th-best month of the year
0.0
Beach & pool
8th-best month of the year

December is a weaker month for outdoor sightseeing in Altstadt Sud.

What to pack for Altstadt Sud in December

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

In December, Altstadt Sud sees daytime highs around 6°C and nights near 2°C. Pack a warm layer and rain gear. Worth having: a heavy coat. About 16 days see rain.

a warm layerrain geara heavy coat

UV index in Altstadt Sud in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Altstadt Sud peaks around July 13 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 13UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul7High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Altstadt Sud in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Altstadt Sud is worst in April — around 15 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1415 µg/m³Dec 109 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar14Moderate
Apr15Moderate
May13Moderate
Jun14Moderate
Jul12Good
Aug12Moderate
Sep12Good
Oct10Good
Nov9Good
Dec9Good
Location & terrain

Where is Altstadt Sud?

Altstadt Sud sits at 50.9°N, 7.0°E, 52 m above sea level, in Germany. The nearest listed city is Altstadt Nord, 1.0 km away.

Topography around Altstadt Sud

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

Within 3 km, the terrain around Altstadt Sud has only modest variations in elevation — a maximum elevation change of 52 m around an average of 52 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 202 m; within 80 km, large variations in elevation — a maximum elevation change of 1,018 m.

The land around Altstadt Sud is covered by artificial surfaces (60%) and trees (29%) within 3 km, trees (43%) and artificial surfaces (25%) within 16 km, and trees (49%) and cropland (20%) within 80 km.

3 km
52 m
16 km
202 m
80 km
1,018 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Altstadt Nord 1.0 km · Cologne 1.0 km · Deutz 1.0 km · Neustadt/Süd 1.0 km · Neustadt/Nord 2.0 km · Humboldtkolonie 2.0 km · Neuehrenfeld 3.0 km · Kalk 3.0 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 Altstadt Sud (50.9333°, 6.9595°, elevation 52 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).