Dej weather in December

In December, Dej sees average daytime highs of 2°C and overnight lows near -3°C, with 57 mm of precipitation across 10 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 17% 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 18 min by month's end. Set against the rest of the year, December is Dej's 12th-clearest and 7th-windiest month. For the whole year in context, see Dej's year-round climate.

Daytime high
11th warmest
Overnight low
-3°
3rd coldest
Precipitation
57 mm
10 wet days
Daylight
8 h 18 min
8:11 AM – 4:30 PM
Cloud cover
72%
12th clearest
Wind
8 km/h
7th windiest
Solar energy
0.99 kWh/m²
Travel score
0.0
out of 10

Dej is locality in Cluj County, Romania.

Air quality
Good
PM10 24.8 µg/m³ · 2019
Founded
1061

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 Dej reaches about 2°C in the afternoon and slips back to -3°C overnight — a 5°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)
14-1
24-2
33-2
43-2
53-2
63-2
73-2
82-2
92-3
102-3
112-3
122-3
132-3
141-3
151-3
161-4
171-4
181-4
191-4
201-4
211-4
221-4
231-4
240-4
250-5
260-5
270-5
280-5
290-5
300-5
310-5

How December really feels in Dej

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.

Dej 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 / -5°48107.78.70.0
Feb / -4°469.75.9100.0
Mar / -0°5910.73.311.61.7
Apr15° / 68120.813.34.4
May20° / 8915014.85.6
Jun23° / 13°10114.5015.66.2
Jul25° / 14°9414.1015.36.3
Aug25° / 14°6910.60146.9
Sep20° / 10°7310.4012.46.3
Oct14° / 659.80.310.64.3
Nov / 549.73.19.11.2
Dec / -3°57105.78.40.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% 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 73%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13169
23169
33268
43169
53169
63070
72971
82971
92872
102773
112674
122674
132575
142476
152476
162476
172575
182476
192575
202575
212575
222674
232674
242674
252674
262674
272773
282773
292872
302872
312773

Chance of precipitation in December

Any precipitationSnow

Dej gets around 57 mm of rain and snow over 10 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 32% and peaks near 34% on the wettest days, and about 6 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
13113
23113
33113
43114
53114
63114
73114
83114
93115
103115
113116
123117
133117
143118
153219
163219
173320
183320
193321
203321
213422
223422
233422
243422
253422
263422
273423
283423
293323
303323
313323

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 8 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 36 min at the start of December to 8 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over December. Sunrise moves from 7:57 AM to 8:18 AM, and sunset from 4:31 PM to 4:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.67:574:31
28.57:584:31
38.57:594:31
48.58:014:30
58.58:024:30
68.58:034:30
78.48:044:30
88.48:054:30
98.48:064:29
108.48:074:29
118.48:074:29
128.48:084:29
138.38:094:29
148.38:104:30
158.38:114:30
168.38:114:30
178.38:124:30
188.38:134:30
198.38:134:31
208.38:144:31
218.38:144:32
228.38:154:32
238.38:154:33
248.38:164:33
258.38:164:34
268.38:174:34
278.38:174:35
288.38:174:36
298.38:174:36
308.38:174:37
318.38:184:38

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.99 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.99 kWh/m² to a high of 5.87 kWh/m² in June across the year — December's 0.99 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.1Dim
21.1Dim
31.1Dim
41.1Dim
51.1Dim
61.0Dim
71.0Dim
81.0Dim
91.0Dim
101.0Dim
111.0Dim
121.0Dim
131.0Dim
141.0Dim
151.0Dim
161.0Dim
171.0Dim
181.0Dim
191.0Dim
201.0Dim
211.0Dim
221.0Dim
231.0Dim
241.0Dim
251.0Dim
261.0Dim
271.0Dim
281.0Dim
291.0Dim
301.0Dim
311.0Dim
Planning a trip in December

Is December a good time to visit Dej?

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 Dej.

What to pack for Dej in December

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

In December, Dej sees daytime highs around 2°C and nights near -3°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

UV index in Dej 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 Dej 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 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highModerateLowJul 15UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr7High
May6High
Jun8Very high
Jul8Very high
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Dej?

Dej sits at 47.1°N, 23.9°E, 231 m above sea level, in Romania. The nearest listed city is Gherla, 14 km away.

Cluj-NapocaBistriţaBaia SprieBaia MareZalăuTurdaCâmpia Turzii

Topography around Dej

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

Within 3 km, the terrain around Dej has only modest variations in elevation — a maximum elevation change of 205 m around an average of 278 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 588 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,127 m.

The land around Dej is covered by grassland (30%), trees (29%) and cropland (24%) within 3 km, trees (46%) and grassland (37%) within 16 km, and trees (46%) and grassland (37%) within 80 km.

3 km
205 m
16 km
588 m
80 km
2,127 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Gherla 14 km · Cluj-Napoca 47 km · Bistriţa 48 km · Baia Sprie 58 km · Baia Mare 61 km · Zalău 62 km · Turda 65 km · Câmpia Turzii 67 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 Dej (47.15°, 23.8667°, elevation 231 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).