Constanța weather in December

In December, Constanța sees average daytime highs of 7°C and overnight lows near 3°C, with 46 mm of precipitation across 8 wet days and about 8.7 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 8°C in the first days to 5°C by the end. The sky is clear or mostly clear about 23% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 54 min at the start of December to 8 h 42 min by month's end. Set against the rest of the year, December is Constanța's 11th-clearest and 1st-windiest month. For the whole year in context, see Constanța's year-round climate.

Daytime high
10th warmest
Overnight low
3rd coldest
Precipitation
46 mm
8 wet days
Daylight
8 h 42 min
7:41 AM – 4:23 PM
Cloud cover
69%
11th clearest
Wind
21 km/h
1st windiest
Solar energy
1.24 kWh/m²
Travel score
0.7
out of 10

Constanța is locality in Constanța County, Romania.

Air quality
Moderate
PM2.5 12.4 µg/m³ · 2018
Founded
~300 BCE

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 8°C in the first days to 5°C by the end.

A typical December day in Constanța reaches about 7°C in the afternoon and slips back to 3°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 5°C cooler than November and about 2°C warmer than January.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
185
285
385
485
584
684
774
874
974
1074
1173
1273
1373
1473
1563
1663
1763
1863
1963
2062
2162
2262
2362
2462
2562
2662
2762
2852
2952
3052
3152

How December really feels in Constanța

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 26 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
26
wind chill below the day's low

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

Constanța weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 447.33.69.10.0
Feb / 336.22.410.20.2
Mar / 417.81.111.61.5
Apr12° / 336.90.113.23.6
May18° / 14°366.9014.56.4
Jun23° / 19°396.8015.37.7
Jul26° / 21°304.90158.1
Aug26° / 22°314.8013.88.2
Sep22° / 18°515.9012.37.6
Oct17° / 13°506.8010.85.6
Nov11° / 457.10.69.43.0
Dec / 4682.28.70.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13169
23169
33169
43070
53070
63070
73169
83070
93169
103268
113268
123268
133466
143466
153466
163466
173565
183664
193763
203763
213763
223862
233862
243862
253763
263862
273763
283664
293664
303664
313565

Chance of precipitation in December

Any precipitationSnow

Constanța gets around 46 mm of rain and snow over 8 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 26% and peaks near 27% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1274
2274
3265
4265
5265
6265
7255
8256
9256
10256
11257
12257
13257
14258
15258
16268
17268
18269
19269
20269
21269
22269
23269
242710
252710
262710
272710
282611
292611
302611
312611

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 21 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 21 km/h on the calmest days to 21 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
121breezy
221breezy
321breezy
421breezy
521breezy
621breezy
721breezy
821breezy
921breezy
1021breezy
1121breezy
1221breezy
1321breezy
1421breezy
1521breezy
1621breezy
1721breezy
1821breezy
1921breezy
2021breezy
2121breezy
2221breezy
2321breezy
2421breezy
2521breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy
3121breezy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 54 min at the start of December to 8 h 42 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 7:27 AM to 7:47 AM, and sunset from 4:23 PM to 4:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.97:274:23
28.97:284:23
38.97:294:23
48.97:304:22
58.87:314:22
68.87:324:22
78.87:334:22
88.87:344:22
98.87:354:22
108.87:364:22
118.77:374:22
128.77:384:22
138.77:394:22
148.77:394:22
158.77:404:22
168.77:414:23
178.77:414:23
188.77:424:23
198.77:434:24
208.77:434:24
218.77:444:24
228.77:444:25
238.77:454:25
248.77:454:26
258.77:454:26
268.77:464:27
278.77:464:28
288.77:464:28
298.77:474:29
308.77:474:30
318.77:474:30

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.24 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.24 kWh/m² to a high of 6.71 kWh/m² in July across the year — December's 1.24 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.3Dim
21.3Dim
31.3Dim
41.3Dim
51.3Dim
61.3Dim
71.3Dim
81.2Dim
91.2Dim
101.2Dim
111.2Dim
121.2Dim
131.2Dim
141.2Dim
151.2Dim
161.2Dim
171.2Dim
181.2Dim
191.2Dim
201.2Dim
211.2Dim
221.2Dim
231.3Dim
241.3Dim
251.3Dim
261.3Dim
271.3Dim
281.3Dim
291.3Dim
301.3Dim
311.3Dim
Planning a trip in December

Is December a good time to visit Constanța?

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

0.7
Sightseeing
10th-best month of the year
0.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Constanța.

What to pack for Constanța in December

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

In December, Constanța sees daytime highs around 7°C and nights near 3°C. Pack a warm layer. Worth having: a heavy coat, rain gear and a windbreaker. About 8 days see rain.

a warm layera heavy coatrain geara windbreaker

Sea temperature near Constanța in December

The nearest coast averages about 10°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 20 km away) is warmest in August at about 25°C and coldest in February near 6°C.

It's comfortable for a long swim from Jun 12 to Sep 29 — about 3.6 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan7Bracing
Feb6Bracing
Mar7Bracing
Apr10Bracing
May16Cool
Jun21Refreshing
Jul24Refreshing
Aug25Warm
Sep22Refreshing
Oct18Cool
Nov14Bracing
Dec10Bracing

UV index in Constanța 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 Constanța peaks around July 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 18UV 8Dec 20UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr7High
May6High
Jun8Very high
Jul8Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Constanța 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 Constanța is worst in March — around 20 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 8 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Constanța's WHO annual average of 12.4 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 1719 µg/m³Dec 148 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar20Moderate
Apr14Moderate
May13Moderate
Jun14Moderate
Jul13Moderate
Aug12Moderate
Sep11Good
Oct10Good
Nov9Good
Dec8Good
Location & terrain

Where is Constanța?

Constanța sits at 44.2°N, 28.6°E, 40 m above sea level, in Romania. The nearest listed city is Năvodari, 15 km away.

CernavodăFeteştiFetești-GarăDobrichSlobozia

Topography around Constanța

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

Within 3 km, the terrain around Constanța has only modest variations in elevation — a maximum elevation change of 68 m around an average of 27 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 96 m; within 80 km, significant variations in elevation — a maximum elevation change of 397 m.

The land around Constanța is covered by artificial surfaces (61%) within 3 km, water (51%) and cropland (32%) within 16 km, and cropland (52%) and water (31%) within 80 km.

3 km
68 m
16 km
96 m
80 km
397 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Năvodari 15 km · Medgidia 29 km · Mangalia 41 km · Cernavodă 51 km · Feteşti 68 km · Fetești-Gară 70 km · Dobrich 94 km · Slobozia 110 km

Romania travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 44% of US
price level, 2025
GDP per capita
$22,538
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
82%
of population, 2024
Homicide rate
1.1
per 100k, 2023
Road deaths
10.3
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 605
Religion
Romanian Orthodox 85%other 5%Roman Catholic 5%Reformed 3%

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 Constanța (44.1807°, 28.6343°, elevation 40 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. 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).