Cluj-Napoca weather in December

In December, Cluj-Napoca sees average daytime highs of 2°C and overnight lows near -4°C, with 43 mm of precipitation across 8.8 wet days and about 8.4 hours of daylight. It is the 11th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 3°C in the first days to 0°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 36 min at the start of December to 8 h 24 min by month's end. Set against the rest of the year, December is Cluj-Napoca's 11th-clearest and 11th-windiest month. For the whole year in context, see Cluj-Napoca's year-round climate.

Daytime high
11th warmest
Overnight low
-4°
3rd coldest
Precipitation
43 mm
8.8 wet days
Daylight
8 h 24 min
8:11 AM – 4:33 PM
Cloud cover
65%
11th clearest
Wind
7 km/h
11th windiest
Solar energy
1.12 kWh/m²
Travel score
0.0
out of 10

Cluj-Napoca is city and seat of Cluj County in northwestern Romania.

Air quality
Elevated
PM2.5 17.8 µg/m³ · 2017
Density
1,597/km²
people per km²
Founded
1213

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 3°C in the first days to 0°C by the end.

A typical December day in Cluj-Napoca reaches about 2°C in the afternoon and slips back to -4°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between -4°C and 7°C. Set against its neighbours, December runs about 6°C cooler than November and about 1°C warmer than January.

-15°-10°-5°10°151015202531
Avg high (°C)Avg low (°C)
14-2
24-2
33-3
43-3
53-3
63-3
73-3
82-3
92-3
102-3
112-4
122-4
132-4
142-4
151-4
161-4
171-4
181-5
191-5
201-5
211-5
221-5
231-5
241-5
250-5
260-5
270-6
280-6
290-6
300-6
310-6

How December really feels in Cluj-Napoca

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.

Cluj-Napoca weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -6°3486.58.80.0
Feb / -5°359.25.8100.0
Mar / -1°49103.811.61.5
Apr14° / 6812.61.313.33.9
May19° / 8915.9014.85.3
Jun22° / 12°10716015.65.8
Jul24° / 13°10215.6015.36.2
Aug25° / 13°8412.40146.8
Sep20° / 7110.3012.46.2
Oct14° / 5690.610.64.3
Nov / 428.639.21.2
Dec / -4°438.85.68.40.0

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 14% of December, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23961
34060
43862
53862
63862
73763
83763
93664
103565
113664
123664
133565
143565
153565
163466
173565
183565
193664
203664
213763
223664
233862
243862
253862
263862
273862
283862
293862
303862
313763

Chance of precipitation in December

Any precipitationSnow

Cluj-Napoca gets around 43 mm of rain and snow over 8.8 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 28% and peaks near 29% on the wettest days, and about 6 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
12913
22913
32913
42914
52914
62914
72914
82815
92815
102816
112816
122817
132717
142718
152818
162819
172819
182820
192820
202820
212921
222921
232921
242921
252921
262921
272921
282921
292921
302821
312821

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 7 km/h in December.

Across December, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 36 min at the start of December to 8 h 24 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 7:57 AM to 8:17 AM, and sunset from 4:34 PM to 4:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.67:574:34
28.67:584:34
38.67:594:33
48.58:004:33
58.58:014:33
68.58:024:32
78.58:034:32
88.58:044:32
98.48:054:32
108.48:064:32
118.48:074:32
128.48:084:32
138.48:094:32
148.48:094:32
158.48:104:32
168.48:114:33
178.48:124:33
188.38:124:33
198.38:134:33
208.38:134:34
218.38:144:34
228.38:144:35
238.38:154:35
248.38:154:36
258.38:164:36
268.38:164:37
278.48:164:38
288.48:174:38
298.48:174:39
308.48:174:40
318.48:174:40

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.12 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.12 kWh/m² to a high of 5.8 kWh/m² in June across the year — December's 1.12 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.2Dim
21.2Dim
31.2Dim
41.2Dim
51.2Dim
61.2Dim
71.2Dim
81.1Dim
91.1Dim
101.1Dim
111.1Dim
121.1Dim
131.1Dim
141.1Dim
151.1Dim
161.1Dim
171.1Dim
181.1Dim
191.1Dim
201.1Dim
211.1Dim
221.1Dim
231.1Dim
241.1Dim
251.1Dim
261.1Dim
271.1Dim
281.1Dim
291.1Dim
301.1Dim
311.1Dim
Planning a trip in December

Is December a good time to visit Cluj-Napoca?

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 Cluj-Napoca.

What to pack for Cluj-Napoca in December

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

In December, Cluj-Napoca sees daytime highs around 2°C and nights near -4°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 9 days see rain.

a warm layera heavy coatrain gear

UV index in Cluj-Napoca 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 Cluj-Napoca peaks around July 15 at about 8 (very 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highModerateLowJul 15UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr7High
May6High
Jun8Very high
Jul8Very high
Aug8Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Cluj-Napoca 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 Cluj-Napoca is worst in April — around 24 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 11 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Cluj-Napoca's WHO annual average of 17.8 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1624 µg/m³Dec 1511 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb17Moderate
Mar22Moderate
Apr24Moderate
May22Moderate
Jun22Moderate
Jul21Moderate
Aug19Moderate
Sep15Moderate
Oct12Moderate
Nov13Moderate
Dec11Good
Location & terrain

Where is Cluj-Napoca?

Cluj-Napoca sits at 46.8°N, 23.6°E, 352 m above sea level, in Romania. The nearest listed city is Turda, 26 km away.

Ocna MureşDejLuduşAiudZalău

Topography around Cluj-Napoca

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

Within 3 km, the terrain around Cluj-Napoca has only modest variations in elevation — a maximum elevation change of 202 m around an average of 375 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 546 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,669 m.

The land around Cluj-Napoca is covered by artificial surfaces (61%) and trees (24%) within 3 km, grassland (45%), trees (25%) and cropland (21%) within 16 km, and trees (43%), grassland (35%) and cropland (20%) within 80 km.

3 km
202 m
16 km
546 m
80 km
1,669 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Turda 26 km · Câmpia Turzii 32 km · Gherla 38 km · Ocna Mureş 47 km · Dej 47 km · Luduş 50 km · Aiud 52 km · Zalău 64 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 Cluj-Napoca (46.7667°, 23.6°, elevation 352 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).