Constanța weather in January

In January, Constanța sees average daytime highs of 5°C and overnight lows near 1°C, with 44 mm of precipitation across 7.3 wet days and about 9.1 hours of daylight. It is the 12th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 5°C through the month. The sky is clear or mostly clear about 22% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 42 min at the start of January to 9 h 30 min by month's end. Set against the rest of the year, January is Constanța's 12th-clearest and 2nd-windiest month. For the whole year in context, see Constanța's year-round climate.

Daytime high
12th warmest
Overnight low
1st coldest
Precipitation
44 mm
7.3 wet days
Daylight
9 hours
7:44 AM – 4:46 PM
Cloud cover
71%
12th clearest
Wind
21 km/h
2nd windiest
Solar energy
1.49 kWh/m²
Travel score
0.0
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 January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 5°C through the month.

A typical January day in Constanța 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, January runs about 2°C cooler than December and on par with February.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
152
252
352
452
551
651
751
851
951
1051
1151
1251
1351
1451
1551
1651
1751
1851
1951
2051
2141
2241
2341
2441
2541
2641
2741
2841
2941
3041
3151

How January really feels in Constanța

Once humidity and wind are folded in, January 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 January is cold — wind chill drags the overnight "feels like" below the raw low.

Constanța weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 5th-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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in January, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 11% of January, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23466
33466
43466
53367
63367
73268
83268
93268
103268
113268
123169
133169
143169
153169
163169
173169
183169
193169
203268
213268
223268
233268
243268
253268
263268
273367
283367
293466
303466
313466

Chance of precipitation in January

Any precipitationSnow

Constanța gets around 44 mm of rain and snow over 7.3 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 23% and peaks near 26% on the wettest days, and about 4 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
12512
22512
32412
42411
52311
62211
72211
82110
92010
10209
11199
12199
13199
14199
15199
16209
17219
18219
192210
202310
212411
222411
232512
242512
252613
262613
272613
282513
292513
302513
312513

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January 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 January

Winds average 21 km/h in January.

Across January, daily wind ranges from about 20 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
920breezy
1020breezy
1120breezy
1220breezy
1320breezy
1420breezy
1520breezy
1620breezy
1721breezy
1821breezy
1921breezy
2021breezy
2121breezy
2221breezy
2321breezy
2421breezy
2521breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy
3121breezy

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 42 min at the start of January to 9 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over January. Sunrise moves from 7:47 AM to 7:33 AM, and sunset from 4:31 PM to 5:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.77:474:31
28.77:474:32
38.87:474:32
48.87:474:33
58.87:474:34
68.87:474:35
78.87:464:36
88.87:464:37
98.97:464:38
108.97:464:39
118.97:464:40
128.97:454:41
139.07:454:42
149.07:454:43
159.07:444:45
169.07:444:46
179.17:434:47
189.17:434:48
199.17:424:49
209.17:424:50
219.27:414:52
229.27:404:53
239.27:404:54
249.37:394:56
259.37:384:57
269.37:374:58
279.47:374:59
289.47:365:01
299.57:355:02
309.57:345:03
319.57:335:05

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.49 kWh/m².

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 — January's 1.49 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.3Dim
21.3Dim
31.3Dim
41.3Dim
51.3Dim
61.3Dim
71.4Dim
81.4Dim
91.4Dim
101.4Dim
111.4Dim
121.4Dim
131.4Dim
141.4Dim
151.5Dim
161.5Dim
171.5Dim
181.5Dim
191.5Dim
201.6Dim
211.6Dim
221.6Dim
231.6Dim
241.7Dim
251.7Dim
261.7Dim
271.8Dim
281.8Dim
291.8Dim
301.9Dim
311.9Dim
Planning a trip in January

Is January a good time to visit Constanța?

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

0.0
Sightseeing
12th-best month of the year
0.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Constanța.

What to pack for Constanța in January

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

In January, Constanța sees daytime highs around 5°C and nights near 1°C. Pack a warm layer. Worth having: a heavy coat and a windbreaker. About 7 days see rain.

a warm layera heavy coata windbreaker

Sea temperature near Constanța in January

The nearest coast averages about 7°C in January — 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 January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January 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
January 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).